Question: when did fire ants come to the us
[{'answer': '1930s', 'provenance': [{'wikipedia_id': '36742882', 'title': 'Red imported fire ants in the United States', 'start_paragraph_id': 3, 'start_character': 7, 'end_paragraph_id': 3, 'end_character': 12, 'bleu_score': 1.0, 'section': 'Section::::Introduction.\n'}]}, {'provenance': [{'wikipedia_id': '36742882', 'title': 'Red imported fire ants in the United States', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 1011, 'bleu_score': 0.972738029725667, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12013926297182614112}, 'section': 'Section::::Introduction.\n'}]}]