Question: how many seasons does csi las vegas have
[{'answer': '15 seasons', 'provenance': [{'wikipedia_id': '247787', 'title': 'CSI: Crime Scene Investigation', 'start_paragraph_id': 1, 'start_character': 203, 'end_paragraph_id': 1, 'end_character': 213, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '247787', 'title': 'CSI: Crime Scene Investigation', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 444, 'bleu_score': 0.8118295050791481, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1827618419856088439}, 'section': 'Section::::Abstract.'}]}]