Question: when was the soil and water conservation act passed
[{'answer': '1977', 'provenance': [{'wikipedia_id': '23611223', 'title': 'Soil and Water Conservation Act', 'start_paragraph_id': 1, 'start_character': 47, 'end_paragraph_id': 1, 'end_character': 51, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '23611223', 'title': 'Soil and Water Conservation Act', 'start_paragraph_id': 1, 'start_character': 4, 'end_paragraph_id': 1, 'end_character': 766, 'bleu_score': 0.9211281941828441, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11385559212853726461}, 'section': 'Section::::Abstract.'}]}]