Question: what is the oldest ballpark in major league baseball
[{'answer': 'Fenway Park in Boston', 'provenance': [{'wikipedia_id': '643381', 'title': 'List of current Major League Baseball stadiums', 'start_paragraph_id': 2, 'start_character': 151, 'end_paragraph_id': 2, 'end_character': 172, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '643381', 'title': 'List of current Major League Baseball stadiums', 'start_paragraph_id': 2, 'start_character': 4, 'end_paragraph_id': 2, 'end_character': 238, 'bleu_score': 0.856159240644173, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3756728763878302062}, 'section': 'Section::::Abstract.'}]}]