Question: what are the different types of heat transfer
[{'answer': 'parallel flow', 'provenance': [{'wikipedia_id': '184726', 'title': 'Heat transfer', 'start_paragraph_id': 112, 'start_character': 45, 'end_paragraph_id': 112, 'end_character': 58, 'bleu_score': 1.0, 'section': 'Section::::Engineering.:Devices.:Heat exchangers.\n'}]}, {'answer': 'counter flow', 'provenance': [{'wikipedia_id': '184726', 'title': 'Heat transfer', 'start_paragraph_id': 112, 'start_character': 60, 'end_paragraph_id': 112, 'end_character': 72, 'bleu_score': 1.0, 'section': 'Section::::Engineering.:Devices.:Heat exchangers.\n'}]}, {'answer': 'cross flow', 'provenance': [{'wikipedia_id': '184726', 'title': 'Heat transfer', 'start_paragraph_id': 112, 'start_character': 78, 'end_paragraph_id': 112, 'end_character': 88, 'bleu_score': 1.0, 'section': 'Section::::Engineering.:Devices.:Heat exchangers.\n'}]}, {'provenance': [{'wikipedia_id': '184726', 'title': 'Heat transfer', 'start_paragraph_id': 112, 'start_character': 0, 'end_paragraph_id': 112, 'end_character': 428, 'bleu_score': 0.8602197748357281, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8106907690725253898}, 'section': 'Section::::Engineering.:Devices.:Heat exchangers.\n'}]}]