Question: who wrote the letter to the hebrews in the bible
[{'answer': 'unknown', 'provenance': [{'wikipedia_id': '9901', 'title': 'Epistle to the Hebrews', 'start_paragraph_id': 2, 'start_character': 188, 'end_paragraph_id': 2, 'end_character': 195, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '9901', 'title': 'Epistle to the Hebrews', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 257, 'bleu_score': 0.809337332253073, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11747979262916691251}, 'section': 'Section::::Abstract.'}]}]