Question: how many different color m&m's are there
[{'answer': '17', 'provenance': [{'wikipedia_id': '485487', 'title': "M&M's", 'start_paragraph_id': 31, 'start_character': 11, 'end_paragraph_id': 31, 'end_character': 13, 'bleu_score': 1.0, 'section': 'Section::::History.:2010s.\n'}]}, {'provenance': [{'wikipedia_id': '485487', 'title': "M&M's", 'start_paragraph_id': 92, 'start_character': 0, 'end_paragraph_id': 92, 'end_character': 272, 'bleu_score': 0.9560167778278961, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1285608979399369842}, 'section': "Section::::Color changes in chocolate M&M's.\n"}]}]