{"type": {"key": "/type/work"}, "title": "[Gradual followed by tropes, kyriale, sequences and sacramentary.]", "subjects": ["Graduals (Liturgical books)", "Kyriales", "Sacramentaries", "Tropers", "Sequences (Liturgy)"], "subject_times": ["12th century", "12 century"], "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL1681053A"}}], "key": "/works/OL45284432W", "latest_revision": 1, "revision": 1, "created": {"type": "/type/datetime", "value": "2026-04-30T15:44:50.743749"}, "last_modified": {"type": "/type/datetime", "value": "2026-04-30T15:44:50.743749"}}