{"first_publish_date": "1951", "key": "/works/OL2967741W", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL453646A"}}, {"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL3375305A"}}], "subjects": ["Librettos", "Operas", "Drama", "Christian pilgrims and pilgrimages", "General", "History - General History", "Operas, librettos", "Decorative arts", "Exhibitions"], "title": "Pilgrim's progress", "dewey_number": ["782.8", "782.1"], "type": {"key": "/type/work"}, "covers": [13746607], "latest_revision": 6, "revision": 6, "created": {"type": "/type/datetime", "value": "2009-12-10T01:16:39.337950"}, "last_modified": {"type": "/type/datetime", "value": "2026-03-23T02:07:15.397262"}}