Question: when was the first tacoma narrows bridge built
[{'answer': '1940', 'provenance': [{'wikipedia_id': '73316', 'title': 'Tacoma Narrows Bridge', 'start_paragraph_id': 1, 'start_character': 431, 'end_paragraph_id': 1, 'end_character': 435, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '73316', 'title': 'Tacoma Narrows Bridge', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 656, 'bleu_score': 0.9815648442794911, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9529677101961112792}, 'section': 'Section::::Abstract.'}]}]