Question: who wrote the pathbreaking book on pollution titled silent spring
[{'answer': 'Rachel Carson', 'provenance': [{'wikipedia_id': '81283', 'title': 'Silent Spring', 'start_paragraph_id': 1, 'start_character': 50, 'end_paragraph_id': 1, 'end_character': 63, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '81283', 'title': 'Silent Spring', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 352, 'bleu_score': 0.6560571378138721, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15934141167465591373}, 'section': 'Section::::Abstract.'}]}]