{"title": "The invisible billionaire, Daniel Ludwig", "covers": [-1], "subject_places": ["United States"], "subjects": ["Biography", "Capitalists and financiers", "Merchant marine", "Millionaires", "Millionaires, biography", "Billionaires", "Rich people"], "subject_people": ["Daniel Keith Ludwig (1897-1992)"], "key": "/works/OL5260552W", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL1189415A"}}], "type": {"key": "/type/work"}, "latest_revision": 6, "revision": 6, "created": {"type": "/type/datetime", "value": "2009-12-10T09:16:24.450070"}, "last_modified": {"type": "/type/datetime", "value": "2023-12-11T10:39:18.912894"}}