Question: the book silent spring had a major impact on the creation of which agency
[{'answer': 'Environmental Protection Agency', 'provenance': [{'wikipedia_id': '81283', 'title': 'Silent Spring', 'start_paragraph_id': 2, 'start_character': 661, 'end_paragraph_id': 2, 'end_character': 692, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '81283', 'title': 'Silent Spring', 'start_paragraph_id': 37, 'start_character': 0, 'end_paragraph_id': 37, 'end_character': 1204, 'bleu_score': 0.9707668775736881, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13842871160998865004}, 'section': 'Section::::Impact.:Grassroots environmentalism and the EPA.\n'}]}]