Question: what iron maiden album is the trooper on
[{'answer': 'Piece of Mind', 'provenance': [{'wikipedia_id': '1116632', 'title': 'The Trooper', 'start_paragraph_id': 1, 'start_character': 160, 'end_paragraph_id': 1, 'end_character': 173, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1116632', 'title': 'The Trooper', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 480, 'bleu_score': 0.979054689945215, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 387030715399813173}, 'section': 'Section::::Abstract.'}]}]