Question: when did the houston astros start playing baseball
[{'answer': '1962', 'provenance': [{'wikipedia_id': '13894', 'title': 'Houston Astros', 'start_paragraph_id': 3, 'start_character': 33, 'end_paragraph_id': 3, 'end_character': 37, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]