Question: what is a comparison of energy output with energy input
[{'answer': 'Energy conversion efficiency', 'provenance': [{'wikipedia_id': '7005062', 'title': 'Energy conversion efficiency', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 28, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '7005062', 'title': 'Energy conversion efficiency', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 252, 'bleu_score': 0.9517713210466091, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2579495057235369458}, 'section': 'Section::::Abstract.'}]}]