{"title": "Mathematical Carnival", "key": "/works/OL459942W", "authors": [{"author": {"key": "/authors/OL26894A"}, "type": {"key": "/type/author_role"}}], "type": {"key": "/type/work"}, "subjects": ["Mathematical recreations", "Denksport", "Physikalische Denkaufgaben", "Mathematische Denkaufgaben", "Mathematik", "Denkaufgaben", "Unterhaltungsmathematik", "Denkaufgabe"], "covers": [6280899], "latest_revision": 4, "revision": 4, "created": {"type": "/type/datetime", "value": "2009-12-08T02:36:22.861390"}, "last_modified": {"type": "/type/datetime", "value": "2022-12-14T18:44:16.933915"}}