Question: when was the first ford model a built
[{'answer': 'October 20 , 1927', 'provenance': [{'wikipedia_id': '6578150', 'title': 'Ford Model A (1927–31)', 'start_paragraph_id': 1, 'start_character': 217, 'end_paragraph_id': 1, 'end_character': 234, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '6578150', 'title': 'Ford Model A (1927–31)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 479, 'bleu_score': 0.7659501038020761, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16706071456382001750}, 'section': 'Section::::Abstract.'}]}]