Question: the book of prayers used at mass is called
[{'answer': 'Book of Common Prayer', 'provenance': [{'wikipedia_id': '4953', 'title': 'Book of Common Prayer', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 21, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '4953', 'title': 'Book of Common Prayer', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 1125, 'bleu_score': 0.704875221469327, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 807813777337947103}, 'section': 'Section::::Abstract.'}]}]