Question: who sings the national anthem for the pittsburgh penguins
[{'answer': 'Jeff Jimerson', 'provenance': [{'wikipedia_id': '25974615', 'title': 'Jeff Jimerson', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 13, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '25974615', 'title': 'Jeff Jimerson', 'start_paragraph_id': 1, 'start_character': 48, 'end_paragraph_id': 1, 'end_character': 224, 'bleu_score': 0.8728438749317711, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7981944378248065341}, 'section': 'Section::::Abstract.'}]}]