Question: when was the san francisco golden gate bridge built
[{'answer': '1937', 'provenance': [{'wikipedia_id': '12103', 'title': 'Golden Gate Bridge', 'start_paragraph_id': 2, 'start_character': 178, 'end_paragraph_id': 2, 'end_character': 182, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '12103', 'title': 'Golden Gate Bridge', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 297, 'bleu_score': 0.815345304170618, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16719692965161655148}, 'section': 'Section::::Abstract.'}]}]