{"subtitle": "musizieren mit der eigenen stimme", "covers": [3245474], "first_publish_date": "1967", "latest_revision": 4, "key": "/works/OL153065W", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL2203684A"}}], "created": {"type": "/type/datetime", "value": "2009-10-20T02:25:51.627675"}, "title": "Die Kunst des Singens", "last_modified": {"type": "/type/datetime", "value": "2011-10-19T01:20:47.823148"}, "type": {"key": "/type/work"}, "revision": 4}