Question: what caliber does the thompson machine gun shoot
[{'answer': '. 45 ACP cartridge'}, {'provenance': [{'wikipedia_id': '95006', 'title': 'Thompson submachine gun', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 711, 'bleu_score': 0.808646615360317, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 295946896926094368}, 'section': 'Section::::Abstract.'}]}]