Question: when were the subways built in new york city
[{'answer': 'October 27 , 1904', 'provenance': [{'wikipedia_id': '1489099', 'title': 'History of the New York City Subway', 'start_paragraph_id': 37, 'start_character': 988, 'end_paragraph_id': 37, 'end_character': 1005, 'bleu_score': 1.0, 'section': 'Section::::Beginnings and rapid expansion.:Contracts.:Original IRT contracts.\n'}]}, {'provenance': [{'wikipedia_id': '1489099', 'title': 'History of the New York City Subway', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 1017, 'bleu_score': 0.8420770434182581, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11871185036941696419}, 'section': 'Section::::Abstract.'}]}]