Question: how long did it take for the tohoku tsunami to arrive
[{'answer': '10 to 30 minutes', 'provenance': [{'wikipedia_id': '31150160', 'title': '2011 Tōhoku earthquake and tsunami', 'start_paragraph_id': 45, 'start_character': 164, 'end_paragraph_id': 45, 'end_character': 180, 'bleu_score': 1.0, 'section': 'Section::::Tsunami.:Japan.\n'}]}, {'provenance': [{'wikipedia_id': '31150160', 'title': '2011 Tōhoku earthquake and tsunami', 'start_paragraph_id': 45, 'start_character': 0, 'end_paragraph_id': 45, 'end_character': 909, 'bleu_score': 0.858219794440187, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2786327047117126933}, 'section': 'Section::::Tsunami.:Japan.\n'}]}]