Question: when did government intervention in agricultural markets in the us begin
[{'answer': '1933', 'provenance': [{'wikipedia_id': '16299435', 'title': 'Agricultural policy of the United States', 'start_paragraph_id': 4, 'start_character': 3, 'end_paragraph_id': 4, 'end_character': 7, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '16299435', 'title': 'Agricultural policy of the United States', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 635, 'bleu_score': 0.977897140678983, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13168696677212469415}, 'section': 'Section::::History.\n'}]}]