{"statement_id":"st_46bbad10d52dfa6008e2","subject":{"kind":"product","slug":"macbook-air-15","name":"MacBook Air 15-inch","url":"https://sourcetier.com/products/macbook-air-15"},"attribute":{"key":"weight_kg","label":"Weight (kg)","unit":"kg","core":false},"scope":null,"region":null,"first_recorded_at":"2026-09-11T13:49:30.924Z","current":{"claim_id":"26416782-3ebb-47e5-9da4-96aea00de8de","value":1.51,"unit":"kg","verification_state":"verified","confidence_recorded":71,"observed_on":"2026-09-02","recorded_at":"2026-09-12T11:27:24.449Z","ended_at":null,"ended_by":null,"superseded_by_claim_id":null,"withdrawal_reason":null,"valid_from":null,"extraction":"muster:(?<![\\d.])(\\d\\.\\d{1,3})(?![\\d])\\s*(?:kg|kilograms?)\\b","reader":"text pattern","parser_version":null,"method":null,"excerpt":"...1.15 cm) Width: 13.40 inches (34.04 cm) Depth: 9.35 inches (23.76 cm) Weight: 3.3 pounds (1.51 kg)","sources":[{"url":"https://www.apple.com/macbook-air/specs/","tier":1,"type":"technical_specification","retrieved_on":"2026-09-02","role":"evidence"},{"url":"https://www.apple.com/macbook-air/specs/","tier":1,"type":"technical_specification","retrieved_on":"2026-10-03","role":"evidence"}]},"version_count":2,"versions":[{"claim_id":"d50f8606-a3fd-4d0b-80c0-6701fbb1aa3c","value":1.23,"unit":"kg","verification_state":"verified","confidence_recorded":71,"observed_on":"2026-09-02","recorded_at":"2026-09-11T13:49:30.924Z","ended_at":"2026-09-12T11:27:24.449Z","ended_by":"superseded","superseded_by_claim_id":"26416782-3ebb-47e5-9da4-96aea00de8de","withdrawal_reason":null,"valid_from":null,"extraction":"muster:(?<![\\d.])(\\d\\.\\d{1,3})(?![\\d])\\s*(?:kg|kilograms?)\\b","reader":"text pattern","parser_version":null,"method":null,"excerpt":"(1.23 kg) 6 Depth: 8.46 inches (21.5 cm) Width: 11.97 inches (30.41 cm) Height: 0.44 inch (1.13 cm...","sources":[{"url":"https://www.apple.com/macbook-air/specs/","tier":1,"type":"technical_specification","retrieved_on":"2026-09-02","role":"evidence"}]},{"claim_id":"26416782-3ebb-47e5-9da4-96aea00de8de","value":1.51,"unit":"kg","verification_state":"verified","confidence_recorded":71,"observed_on":"2026-09-02","recorded_at":"2026-09-12T11:27:24.449Z","ended_at":null,"ended_by":null,"superseded_by_claim_id":null,"withdrawal_reason":null,"valid_from":null,"extraction":"muster:(?<![\\d.])(\\d\\.\\d{1,3})(?![\\d])\\s*(?:kg|kilograms?)\\b","reader":"text pattern","parser_version":null,"method":null,"excerpt":"...1.15 cm) Width: 13.40 inches (34.04 cm) Depth: 9.35 inches (23.76 cm) Weight: 3.3 pounds (1.51 kg)","sources":[{"url":"https://www.apple.com/macbook-air/specs/","tier":1,"type":"technical_specification","retrieved_on":"2026-09-02","role":"evidence"},{"url":"https://www.apple.com/macbook-air/specs/","tier":1,"type":"technical_specification","retrieved_on":"2026-10-03","role":"evidence"}]}],"changes":[{"id":"94326","type":"research_update","label":"Research update","material":false,"sentence":"MacBook Air 15-inch: Weight (kg) documented (verified).","noticed_at":"2026-09-11T13:49:30.924Z","subject":{"kind":"product","slug":"macbook-air-15","name":"MacBook Air 15-inch"},"before":null,"after":{"value":1.23,"verification_state":"verified","confidence":71},"claim_id":"d50f8606-a3fd-4d0b-80c0-6701fbb1aa3c","statement_id":"st_46bbad10d52dfa6008e2","corrected":null},{"id":"94429","type":"product_change","label":"Product change","material":false,"sentence":"MacBook Air 15-inch: Weight (kg) changed from 1.23 to 1.51 (verified).","noticed_at":"2026-09-12T11:27:24.449Z","subject":{"kind":"product","slug":"macbook-air-15","name":"MacBook Air 15-inch"},"before":{"value":1.23,"verification_state":"verified","confidence":71},"after":{"value":1.51,"verification_state":"verified","confidence":71},"claim_id":"26416782-3ebb-47e5-9da4-96aea00de8de","statement_id":"st_46bbad10d52dfa6008e2","corrected":null}],"page_url":"https://sourcetier.com/statements/st_46bbad10d52dfa6008e2","contract":"A statement is the question a claim answers: one subject, one attribute, one scope and region. statement_id stays the same when a new value supersedes the old one, when we withdraw it and when two duplicate entities are merged (the old id then redirects). claim_id identifies one version. versions lists every version oldest first; ended_by is superseded, withdrawn or null for the current one. confidence_recorded is the confidence stored when that version was written, not a recomputation. unknown describes our research, never the product."}