Question: where do the sharks come from in sharknado
[{'answer': 'a waterspout', 'provenance': [{'wikipedia_id': '39939755', 'title': 'Sharknado', 'start_paragraph_id': 1, 'start_character': 76, 'end_paragraph_id': 1, 'end_character': 88, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '39939755', 'title': 'Sharknado', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 575, 'bleu_score': 0.64841770305198, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5729317024302951329}, 'section': 'Section::::Abstract.'}]}]