{
  "search_date": "2026-08-26",
  "status": "DONE",
  "providers": {
    "used": ["firecrawl", "tvly", "WebFetch"],
    "unavailable": ["c4a (broken: Playwright browser missing)", "exa web_search_exa (not invoked)"]
  },
  "sources": [
    {"id": "S1", "url": "https://cafef.vn/thoi-han-so-huu-chung-cu-duoc-quy-dinh-the-nao-tu-1-8-188240705164856095.chn", "title": "Thoi han so huu chung cu duoc quy dinh the nao tu 1/8", "publisher": "cafef.vn", "date": "2024-07-05", "provider": "firecrawl"},
    {"id": "S2", "url": "https://dantri.com.vn/bat-dong-san/chinh-thuc-khong-quy-dinh-thoi-han-so-huu-nha-chung-cu-20231127100804047.htm", "title": "Chinh thuc khong quy dinh thoi han so huu nha chung cu", "publisher": "dantri.com.vn", "date": "2023-11-27", "provider": "firecrawl"},
    {"id": "S3", "url": "https://luatvietnam.vn/dat-dai-nha-o/chung-cu-50-nam-va-chung-cu-vinh-vien-567-92623-article.html", "title": "Thoi han so huu nha chung cu la bao lau?", "publisher": "luatvietnam.vn", "date": "undated", "provider": "firecrawl"},
    {"id": "S4", "url": "https://luatvietnam.vn/dat-dai/luat-nha-o-2023-so-27-2023-qh15-284800-d1.html", "title": "Luat Nha o 2023, so 27/2023/QH15", "publisher": "luatvietnam.vn", "date": "2023-11-27", "provider": "firecrawl"},
    {"id": "S5", "url": "https://vnexpress.net/bo-xay-dung-bo-de-xuat-so-huu-chung-cu-co-thoi-han-5097323.html", "title": "Bo Xay dung bo de xuat 'so huu chung cu co thoi han'", "publisher": "vnexpress.net", "date": "2026-07-14", "provider": "tvly"},
    {"id": "S8", "url": "https://luatvietnam.vn/dat-dai-nha-o/thoi-han-su-dung-chung-cu-567-24761-article.html", "title": "Thoi han su dung chung cu khong chi la 50 nam?", "publisher": "luatvietnam.vn", "date": "undated", "provider": "tvly"},
    {"id": "S9", "url": "https://luatvietnam.vn/linh-vuc-khac/danh-sach-89-luat-duoc-quoc-hoi-ban-hanh-nam-2025-883-106587-article.html", "title": "Danh sach 89 Luat duoc Quoc hoi ban hanh nam 2025", "publisher": "luatvietnam.vn", "date": "2025", "provider": "tvly"},
    {"id": "S10", "url": "https://thuviennhadat.vn/phap-luat/luat-so-90-2025-qh15-sua-doi-luat-nha-o-2023-tu-1-7-2025-nhu-the-nao-689383.html", "title": "Luat so 90/2025/QH15 sua doi Luat Nha o 2023", "publisher": "thuviennhadat.vn", "date": "2025", "provider": "WebFetch"},
    {"id": "S11", "url": "https://hethongphapluat.com/luat-dat-dai-2024/dieu-171", "title": "Điều 171 Luat Dat dai 2024 - Dat su dung on dinh lau dai", "publisher": "hethongphapluat.com", "date": "2024", "provider": "WebFetch"},
    {"id": "S12", "url": "https://thuvienphapluat.vn/phap-luat/loai-dat-nao-duoc-su-dung-on-dinh-lau-dai-theo-quy-dinh-tai-dieu-171-luat-dat-dai-nam-2024-141550-174291.html", "title": "Loai dat nao duoc su dung on dinh lau dai Điều 171 LDD 2024", "publisher": "thuvienphapluat.vn", "date": "undated", "provider": "firecrawl"},
    {"id": "S15", "url": "https://nangluongsachvietnam.vn/d6/vi-VN/news/Vi-sao-dat-giao-cho-chu-dau-tu-50-nam-nhung-nguoi-mua-nha-van-duoc-su-dung-lau-dai-6-186-4356", "title": "Vi sao dat giao cho chu dau tu 50 nam nhung nguoi mua nha van duoc su dung lau dai?", "publisher": "nangluongsachvietnam.vn", "date": "undated", "provider": "tvly"},
    {"id": "S16", "url": "https://hethongphapluat.com/luat-dat-dai-2024/dieu-172", "title": "Điều 172 Luat Dat dai 2024 - Dat su dung co thoi han", "publisher": "hethongphapluat.com", "date": "2024", "provider": "WebFetch"},
    {"id": "S17", "url": "https://luatvietnam.vn/tin-phap-luat/luu-y-gi-de-khong-mua-nham-chung-cu-so-huu-50-nam-230-17463-article.html", "title": "Chung cu 50 nam la gi? Luu y gi de khong mua nham?", "publisher": "luatvietnam.vn", "date": "undated", "provider": "tvly"},
    {"id": "S18", "url": "https://thanhnien.vn/chung-cu-moi-se-co-thoi-han-su-dung-185260801224850204.htm", "title": "Chung cu moi se co thoi han su dung", "publisher": "thanhnien.vn", "date": "2026-08-02", "provider": "WebFetch"},
    {"id": "S19", "url": "https://danviet.vn/nghi-quyet-21-nq-tw-can-ho-chung-cu-xay-moi-co-thoi-han-su-dung-theo-nien-han-xay-dung-cong-trinh-d1447503.html", "title": "Nghi quyet 21-NQ/TW: Can ho chung cu xay moi co thoi han su dung theo nien han xay dung cong trinh", "publisher": "danviet.vn", "date": "2026-07-30", "provider": "firecrawl"},
    {"id": "S20", "url": "https://www.vietnamplus.vn/nghi-quyet-21-dot-pha-ve-tu-duy-nang-cao-hieu-qua-tai-tao-tai-san-do-thi-post1127325.vnp", "title": "Nghi quyet 21 dot pha ve tu duy, nang cao hieu qua tai tao tai san do thi", "publisher": "vietnamplus.vn", "date": "2026", "provider": "WebFetch"},
    {"id": "S21", "url": "https://tuoitre.vn/chung-cu-moi-co-nien-han-su-dung-pha-bay-cua-dan-dau-co-chung-cu-so-huu-lau-dai-sap-het-100260802140309196.htm", "title": "Chung cu moi co nien han su dung: Go nut that keo dai nhieu nam", "publisher": "tuoitre.vn", "date": "2026-08-02", "provider": "WebFetch"},
    {"id": "S23", "url": "https://dantri.com.vn/tam-diem/cai-tao-chung-cu-cu-se-het-rua-bo-trong-nam-2025-20250111090441441.htm", "title": "Cai tao chung cu cu se het 'rua bo' trong nam 2025?", "publisher": "dantri.com.vn", "date": "2025-01-12", "provider": "firecrawl"},
    {"id": "S24", "url": "https://dantri.com.vn/bat-dong-san/chi-tiet-lo-trinh-cai-tao-toan-bo-chung-cu-cu-tai-ha-noi-20260429150802305.htm", "title": "Chi tiet lo trinh cai tao toan bo chung cu cu tai Ha Noi", "publisher": "dantri.com.vn", "date": "2026-04-29", "provider": "WebFetch"},
    {"id": "S25", "url": "https://voh.com.vn/tin-tp-ho-chi-minh/tphcm-phe-duyet-de-an-cai-tao-xay-dung-lai-cac-chung-cu-cu-bi-hu-hong-xuong-cap-582729.html", "title": "TPHCM phe duyet de an cai tao chung cu cu", "publisher": "voh.com.vn", "date": "2025", "provider": "firecrawl"},
    {"id": "S26", "url": "https://vtv.vn/cai-tao-chung-cu-cu-thach-thuc-lon-nhat-nam-o-khau-trien-khai-100260318234000409.htm", "title": "Cai tao chung cu cu: Thach thuc lon nhat nam o khau trien khai", "publisher": "vtv.vn", "date": "2026-03-19", "provider": "tvly"},
    {"id": "S27", "url": "https://www.vietnam.vn/ha-noi-giai-bai-toan-chung-cu-cu", "title": "Ha Noi 'giai bai toan' chung cu cu", "publisher": "vietnam.vn", "date": "2026-06-12", "provider": "tvly"},
    {"id": "S28", "url": "http://c3phanchutrinh.daknong.edu.vn/luat-nha-o-sua-doi-nam-2023-luat-co-hieu-luc-thi-hanh-tu-ngay-01012025.html", "title": "Luat Nha o (sua doi) nam 2023", "publisher": "c3phanchutrinh.daknong.edu.vn", "date": "undated", "provider": "tvly"},
    {"id": "S29", "url": "https://suckhoedoisong.vn/9-chung-cu-cu-duoc-ha-noi-dat-muc-tieu-khoi-cong-cai-tao-lai-trong-nam-2026-169260715144712924.htm", "title": "9 chung cu cu duoc Ha Noi dat muc tieu khoi cong cai tao lai trong nam 2026", "publisher": "suckhoedoisong.vn", "date": "2026-07-15", "provider": "tvly"},
    {"id": "S30", "url": "https://tuoitre.vn/dai-bieu-quy-dinh-chung-cu-co-thoi-han-de-khien-nguoi-dan-nghi-50-70-nam-sau-mat-quyen-so-huu-100260819173022223.htm", "title": "Dai bieu: Quy dinh 'chung cu co thoi han' de khien nguoi dan nghi 50, 70 nam sau mat quyen so huu", "publisher": "tuoitre.vn", "date": "2026-08-19", "provider": "WebFetch"},
    {"id": "S31", "url": "https://www.vietnam.vn/chung-cu-50-nam-va-so-huu-lau-dai-khac-nhau-the-nao", "title": "Chung cu 50 nam va so huu lau dai khac nhau the nao", "publisher": "vietnam.vn", "date": "undated", "provider": "WebFetch"}
  ],
  "claims": [
    {
      "id": "C1a",
      "cluster": "C1",
      "text": "Ownership of apartments is a property right with NO automatic 50/70-year expiry",
      "type": "sourced",
      "confidence": "high",
      "independent_sources": 5,
      "source_ids": ["S1","S2","S3","S4","S5"],
      "conflicts": []
    },
    {
      "id": "C1b",
      "cluster": "C1",
      "text": "Thoi han su dung nha chung cu determined by design dossier and actual use time per quality inspection (Điều 58)",
      "type": "sourced",
      "confidence": "high",
      "independent_sources": 4,
      "source_ids": ["S1","S3","S8","S28"],
      "conflicts": []
    },
    {
      "id": "C1c",
      "cluster": "C1",
      "text": "Selling apartments past 50% design life requires mandatory inspection",
      "type": "sourced",
      "confidence": "medium",
      "independent_sources": 2,
      "source_ids": ["S8","S28"],
      "conflicts": []
    },
    {
      "id": "C1d",
      "cluster": "C1",
      "text": "When building use term ends: inspection → continued use / renovation / demolition; owner rights protected",
      "type": "sourced",
      "confidence": "medium",
      "independent_sources": 3,
      "source_ids": ["S8","S28","S3"],
      "conflicts": []
    },
    {
      "id": "C1e",
      "cluster": "C1",
      "text": "Luat 103/2025/QH15 amends the Housing Law (EFFECTIVE 01/8/2025)",
      "type": "inference",
      "confidence": "high",
      "independent_sources": 2,
      "source_ids": ["S9","S10"],
      "conflicts": [{"type": "factual correction", "detail": "Luật 103/2025/QH15 is the Law on Mutual Legal Assistance in Criminal Matters, NOT a Housing Law amendment. The correct 2025 Housing Law amendment is Luật 90/2025/QH15."}]
    },
    {
      "id": "C2a",
      "cluster": "C2",
      "text": "Ca nhan dung dat o do thi → su dung on dinh lau dai per Điều 171 Luat Dat dai 2024",
      "type": "sourced",
      "confidence": "high",
      "independent_sources": 4,
      "source_ids": ["S11","S12","S13","S14"],
      "conflicts": []
    },
    {
      "id": "C2b",
      "cluster": "C2",
      "text": "50-year terms apply to developer project land (Điều 172), NOT to apartment owners' residential land",
      "type": "sourced",
      "confidence": "high",
      "independent_sources": 4,
      "source_ids": ["S15","S16","S17","S12"],
      "conflicts": []
    },
    {
      "id": "C3",
      "cluster": "C3",
      "text": "Nghị quyết số 21-NQ/TW: Ban Chap hanh Trung uong Dang khoa XIV, 28/7/2026, signed by To Lam; policy direction for future law amendments",
      "type": "sourced",
      "confidence": "high",
      "independent_sources": 5,
      "source_ids": ["S18","S19","S20","S21","S22"],
      "conflicts": []
    },
    {
      "id": "C4a",
      "cluster": "C4",
      "text": "National statistics on deteriorated apartment buildings: 1,782 inspected, 196 level D (mid-2024 data from Bo Xay dung)",
      "type": "sourced",
      "confidence": "medium",
      "independent_sources": 2,
      "source_ids": ["S23","S24"],
      "conflicts": []
    },
    {
      "id": "C4b",
      "cluster": "C4",
      "text": "Renovation projects delayed many years: C8 Giang Vo (15 years), 2007-2020 no projects completed",
      "type": "sourced",
      "confidence": "medium",
      "independent_sources": 3,
      "source_ids": ["S26","S27","S24","S29"],
      "conflicts": []
    },
    {
      "id": "C5",
      "cluster": "C5",
      "text": "Myth origins: BXD 2022-2023 proposal / Luat Dat dai 2024 Điều 172 (developer 50-year term) / BXD 2026 re-proposal and withdrawal / NQ 21 / 'chung cu co thoi han' in draft law / marketing category distinction",
      "type": "sourced",
      "confidence": "high",
      "independent_sources": 5,
      "source_ids": ["S5","S15","S18","S19","S20","S21","S30","S31"],
      "conflicts": []
    }
  ],
  "gaps": [
    "Full text of Điều 58, 59, 61, 62, 63 Luat Nha o 2023 not retrieved from primary source (thuvienphapluat.vn returned 403)",
    "No more recent national aggregate statistics beyond mid-2024 (1,782 inspected, 196 level D)",
    "Nghi quyet 21 full official text not retrieved; all info from news reports",
    "Điều 62-63 exact content on renovation/rebuilding rights not found",
    "Trần Duy Hưng renovation project: no specific information found"
  ]
}