Question: how many colors were offered for the 1969 ford mustang boss 429
[{'answer': 'Raven Black', 'provenance': [{'wikipedia_id': '11909427', 'title': 'Boss 429 Mustang', 'start_paragraph_id': 19, 'start_character': 178, 'end_paragraph_id': 19, 'end_character': 189, 'bleu_score': 1.0, 'section': 'Section::::1969 Model.\n'}]}, {'answer': 'Wimbledon White', 'provenance': [{'wikipedia_id': '11909427', 'title': 'Boss 429 Mustang', 'start_paragraph_id': 19, 'start_character': 191, 'end_paragraph_id': 19, 'end_character': 206, 'bleu_score': 1.0, 'section': 'Section::::1969 Model.\n'}]}, {'answer': 'Royal Maroon', 'provenance': [{'wikipedia_id': '11909427', 'title': 'Boss 429 Mustang', 'start_paragraph_id': 19, 'start_character': 208, 'end_paragraph_id': 19, 'end_character': 220, 'bleu_score': 1.0, 'section': 'Section::::1969 Model.\n'}]}, {'answer': 'Candy apple Red', 'provenance': [{'wikipedia_id': '11909427', 'title': 'Boss 429 Mustang', 'start_paragraph_id': 19, 'start_character': 222, 'end_paragraph_id': 19, 'end_character': 237, 'bleu_score': 1.0, 'section': 'Section::::1969 Model.\n'}]}, {'answer': 'Black Jade', 'provenance': [{'wikipedia_id': '11909427', 'title': 'Boss 429 Mustang', 'start_paragraph_id': 19, 'start_character': 243, 'end_paragraph_id': 19, 'end_character': 253, 'bleu_score': 1.0, 'section': 'Section::::1969 Model.\n'}]}, {'provenance': [{'wikipedia_id': '11909427', 'title': 'Boss 429 Mustang', 'start_paragraph_id': 19, 'start_character': 0, 'end_paragraph_id': 19, 'end_character': 1479, 'bleu_score': 0.979019439910597, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6000179470854467311}, 'section': 'Section::::1969 Model.\n'}]}]