Question: ratio of energy transferred by convection to that by conduction
[{'answer': 'The Rayleigh number', 'provenance': [{'wikipedia_id': '184726', 'title': 'Heat transfer', 'start_paragraph_id': 37, 'start_character': 0, 'end_paragraph_id': 37, 'end_character': 19, 'bleu_score': 1.0, 'section': 'Section::::Mechanisms.:Convection vs. conduction.\n'}]}, {'provenance': [{'wikipedia_id': '184726', 'title': 'Heat transfer', 'start_paragraph_id': 47, 'start_character': 0, 'end_paragraph_id': 47, 'end_character': 414, 'bleu_score': 0.9699161750394991, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5580256539635601750}, 'section': 'Section::::Mechanisms.:Convection vs. conduction.\n'}]}]