{"type": {"key": "/type/work"}, "title": "Coal in China during the first and sixth five-year plans", "subjects": ["Coal", "Coal mines and mining"], "subject_places": ["China"], "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL1570052A"}}], "key": "/works/OL44458159W", "latest_revision": 1, "revision": 1, "created": {"type": "/type/datetime", "value": "2025-11-30T10:06:27.136142"}, "last_modified": {"type": "/type/datetime", "value": "2025-11-30T10:06:27.136142"}}