{"last_modified": {"type": "/type/datetime", "value": "2010-12-04T02:41:47.055702"}, "title": "Some educational problems and prospects of a systems approach to instruction", "created": {"type": "/type/datetime", "value": "2009-10-27T22:14:13.640801"}, "subjects": ["Computer-assisted instruction", "Programmed instruction", "Teaching machines"], "latest_revision": 2, "key": "/works/OL394875W", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL16301A"}}], "type": {"key": "/type/work"}, "revision": 2}