Question: how many episodes are in season 1 of soa
[{'answer': '13 episodes', 'provenance': [{'wikipedia_id': '34642963', 'title': 'Sons of Anarchy (season 1)', 'start_paragraph_id': 2, 'start_character': 112, 'end_paragraph_id': 2, 'end_character': 123, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '34642963', 'title': 'Sons of Anarchy (season 1)', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 140, 'bleu_score': 0.9146912192286941, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18329000607901784161}, 'section': 'Section::::Abstract.'}]}]