Question: why does water boil below 100 c at high elevations
[{'answer': 'decreased atmospheric pressure', 'provenance': [{'wikipedia_id': '14898958', 'title': 'High-altitude cooking', 'start_paragraph_id': 1, 'start_character': 295, 'end_paragraph_id': 1, 'end_character': 325, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]