Question: what does egr stand for on a diesel
[{'answer': 'exhaust gas recirculation', 'provenance': [{'wikipedia_id': '158740', 'title': 'Exhaust gas recirculation', 'start_paragraph_id': 1, 'start_character': 32, 'end_paragraph_id': 1, 'end_character': 57, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '158740', 'title': 'Exhaust gas recirculation', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 779, 'bleu_score': 0.923032950308685, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17909132812449176413}, 'section': 'Section::::Abstract.'}]}]