{"created": {"type": "/type/datetime", "value": "2009-12-10T19:22:30.564322"}, "subject_places": ["Pennsylvania"], "subjects": ["Coal", "Coal mines and mining", "Firedamp", "Geology"], "latest_revision": 2, "key": "/works/OL6562785W", "title": "Geology, mining, and methane content of the Freeport and Kittanning coalbeds in Indiana and surrounding counties, Pa", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL1758814A"}}], "type": {"key": "/type/work"}, "last_modified": {"type": "/type/datetime", "value": "2010-12-05T06:05:05.015310"}, "revision": 2}