{"last_modified": {"type": "/type/datetime", "value": "2010-12-05T06:44:33.802438"}, "title": "Bulletin board ideas for elementary and middle school mathematics", "created": {"type": "/type/datetime", "value": "2009-12-10T19:32:23.910907"}, "subjects": ["Audio-visual aids", "Bulletin boards", "Mathematics", "Study and teaching"], "latest_revision": 2, "key": "/works/OL6663041W", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL1800659A"}}], "type": {"key": "/type/work"}, "revision": 2}