Question: where was the first steel track roller coaster located
[{'answer': 'Matterhorn Bobsleds ( Disneyland )', 'provenance': [{'wikipedia_id': '630208', 'title': 'Steel roller coaster', 'start_paragraph_id': 2, 'start_character': 133, 'end_paragraph_id': 2, 'end_character': 168, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Runaway Mine Train ( Six Flags Over Texas )'}, {'provenance': [{'wikipedia_id': '630208', 'title': 'Steel roller coaster', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 231, 'bleu_score': 0.9466178497997021, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9236851225921525930}, 'section': 'Section::::Abstract.'}]}]