Question: how many miles from austin tx to houston tx
[{'answer': '160 miles'}, {'provenance': [{'wikipedia_id': '1998', 'title': 'Austin, Texas', 'start_paragraph_id': 23, 'start_character': 0, 'end_paragraph_id': 23, 'end_character': 173, 'bleu_score': 0.531912720543414, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2382812868043910876}, 'section': 'Section::::Geography.\n'}]}]