Question: what does pcm stand for on a vehicle
[{'answer': 'power - train control module', 'provenance': [{'wikipedia_id': '5199689', 'title': 'Powertrain control module', 'start_paragraph_id': 1, 'start_character': 2, 'end_paragraph_id': 1, 'end_character': 29, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '5199689', 'title': 'Powertrain control module', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 899, 'bleu_score': 0.9866213202385071, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8012821323607758376}, 'section': 'Section::::Abstract.'}]}]