Question: how many variations of power rangers are there
[{'answer': '20 different themed series', 'provenance': [{'wikipedia_id': '173486', 'title': 'Power Rangers', 'start_paragraph_id': 2, 'start_character': 156, 'end_paragraph_id': 2, 'end_character': 182, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '173486', 'title': 'Power Rangers', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 370, 'bleu_score': 0.852053129993093, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16743632717117902497}, 'section': 'Section::::Abstract.'}]}]