{"type": {"key": "/type/work"}, "title": "Den zedelijken en materi\u00eblen toestand der arbeidende bevolking ten platten lande", "subjects": ["Working class", "History", "Agriculture", "Economic conditions"], "subject_places": ["Netherlands"], "subject_times": ["19th century"], "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL384008A"}}], "key": "/works/OL45163764W", "latest_revision": 1, "revision": 1, "created": {"type": "/type/datetime", "value": "2026-04-17T18:14:58.989383"}, "last_modified": {"type": "/type/datetime", "value": "2026-04-17T18:14:58.989383"}}