Question: who wrote there is power in a union
[{'answer': 'Joe Hill', 'provenance': [{'wikipedia_id': '32891831', 'title': 'There Is Power in a Union', 'start_paragraph_id': 1, 'start_character': 49, 'end_paragraph_id': 1, 'end_character': 57, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '32891831', 'title': 'There Is Power in a Union', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 423, 'bleu_score': 0.9731482306711111, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1297499419723525063}, 'section': 'Section::::Abstract.'}]}]