Question: how many heat zones are there on the earth
[{'answer': 'three', 'provenance': [{'wikipedia_id': '8782181', 'title': 'Geographical zone', 'start_paragraph_id': 7, 'start_character': 62, 'end_paragraph_id': 7, 'end_character': 67, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '8782181', 'title': 'Geographical zone', 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 84, 'bleu_score': 0.8702397637697911, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15828079814470154357}, 'section': 'Section::::Abstract.'}]}]