Question: the machine that converts heat energy in steam to electricity is called a
[{'answer': 'steam turbines', 'provenance': [{'wikipedia_id': '27692', 'title': 'Steam engine', 'start_paragraph_id': 35, 'start_character': 68, 'end_paragraph_id': 35, 'end_character': 82, 'bleu_score': 1.0, 'section': 'Section::::History.:Steam turbines.\n'}]}, {'provenance': [{'wikipedia_id': '27692', 'title': 'Steam engine', 'start_paragraph_id': 102, 'start_character': 0, 'end_paragraph_id': 102, 'end_character': 996, 'bleu_score': 0.9864398934896761, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 327345480681753152}, 'section': 'Section::::Types of motor units.:Turbine engines.\n'}]}]