{"subject_places": ["Bonn (Germany)"], "subjects": ["Fortifications", "Military History", "Fortification", "Defenses"], "key": "/works/OL4808791W", "title": "Bonn als Festung", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL1012801A"}}], "type": {"key": "/type/work"}, "latest_revision": 4, "revision": 4, "created": {"type": "/type/datetime", "value": "2009-12-10T07:36:22.207042"}, "last_modified": {"type": "/type/datetime", "value": "2022-12-31T13:59:45.093820"}}