{"last_modified": {"type": "/type/datetime", "value": "2012-07-11T10:10:40.727920"}, "latest_revision": 1, "key": "/works/OL16699860W", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL219358A"}}], "created": {"type": "/type/datetime", "value": "2012-07-11T10:10:40.727920"}, "title": "Early farm tractors", "subject_places": ["United States"], "subjects": ["Commercial art", "Farm tractors in art", "History"], "subject_times": ["20th century"], "type": {"key": "/type/work"}, "revision": 1}