Question: when was the green monster added to fenway park
[{'answer': '1912', 'provenance': [{'wikipedia_id': '180809', 'title': 'Green Monster', 'start_paragraph_id': 3, 'start_character': 59, 'end_paragraph_id': 3, 'end_character': 63, 'bleu_score': 1.0, 'section': 'Section::::Overview.\n'}]}, {'provenance': [{'wikipedia_id': '180809', 'title': 'Green Monster', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 584, 'bleu_score': 0.9812185674664711, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3735457507012812186}, 'section': 'Section::::Overview.\n'}]}]