{"type": {"key": "/type/work"}, "title": "The materialist conception of history", "subjects": ["History", "Philosophy", "Materialism"], "subject_people": ["Antonio Labriola (1843-1904)", "Karl Marx (1818-1883)"], "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL18194A"}}], "key": "/works/OL38724807W", "latest_revision": 1, "revision": 1, "created": {"type": "/type/datetime", "value": "2024-07-19T18:01:23.002076"}, "last_modified": {"type": "/type/datetime", "value": "2024-07-19T18:01:23.002076"}}