Question: what does amg stand for in mercedes benz cars
[{'answer': 'Aufrecht', 'provenance': [{'wikipedia_id': '854888', 'title': 'Mercedes-AMG', 'start_paragraph_id': 6, 'start_character': 209, 'end_paragraph_id': 6, 'end_character': 217, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'answer': 'Melcher', 'provenance': [{'wikipedia_id': '854888', 'title': 'Mercedes-AMG', 'start_paragraph_id': 6, 'start_character': 229, 'end_paragraph_id': 6, 'end_character': 236, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'answer': "Großaspach ( Aufrecht 's birth town )"}, {'provenance': [{'wikipedia_id': '854888', 'title': 'Mercedes-AMG', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 596, 'bleu_score': 0.979054689945215, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3413372562439728744}, 'section': 'Section::::History.\n'}]}]