{"created": {"type": "/type/datetime", "value": "2009-12-10T07:34:14.333966"}, "title": "Attitudes to social structure and mobility in upper Canada, 1815-1840", "covers": [4530260], "subject_places": ["Ontario"], "last_modified": {"type": "/type/datetime", "value": "2010-12-04T17:12:13.879856"}, "latest_revision": 3, "key": "/works/OL4797254W", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL1009500A"}}], "subject_times": ["19th century"], "type": {"key": "/type/work"}, "subjects": ["History", "Social mobility", "Social structure"], "revision": 3}