Question: how many times was ben cartwright married on bonanza
[{'answer': 'three', 'provenance': [{'wikipedia_id': '180093', 'title': 'Bonanza', 'start_paragraph_id': 6, 'start_character': 145, 'end_paragraph_id': 6, 'end_character': 150, 'bleu_score': 1.0, 'section': 'Section::::Premise.\n'}]}, {'provenance': [{'wikipedia_id': '180093', 'title': 'Bonanza', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 897, 'bleu_score': 0.9858648355536391, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2531334173911318571}, 'section': 'Section::::Premise.\n'}]}]