Question: around how many tornados touch down in the united states every year
[{'answer': 'more than 1,200 tornadoes annually', 'provenance': [{'wikipedia_id': '18436515', 'title': 'Tornadoes in the United States', 'start_paragraph_id': 1, 'start_character': 101, 'end_paragraph_id': 1, 'end_character': 135, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '18436515', 'title': 'Tornadoes in the United States', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 307, 'bleu_score': 0.9325718821645921, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13411907649742898164}, 'section': 'Section::::Abstract.'}]}]