{"subtitle": "Professor Einstein's address at the University of Nottingham.", "first_publish_date": "1930", "latest_revision": 4, "key": "/works/OL1214028W", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL3175986A"}}], "subjects": ["Physics"], "created": {"type": "/type/datetime", "value": "2009-12-09T20:45:28.431002"}, "title": "[ Concept of space]", "last_modified": {"type": "/type/datetime", "value": "2011-12-05T18:11:27.623255"}, "type": {"key": "/type/work"}, "revision": 4}