Question: who was an important figure in developing the strength of labor unions in the united states
[{'answer': 'Samuel Gompers', 'provenance': [{'wikipedia_id': '2474406', 'title': 'Labor unions in the United States', 'start_paragraph_id': 8, 'start_character': 61, 'end_paragraph_id': 8, 'end_character': 75, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '2474406', 'title': 'Labor unions in the United States', 'start_paragraph_id': 8, 'start_character': 0, 'end_paragraph_id': 8, 'end_character': 318, 'bleu_score': 0.9632870032952191, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17224257006126221803}, 'section': 'Section::::History.\n'}]}]