Question: what is the boy group in pitch perfect called
[{'answer': 'Treblemakers', 'provenance': [{'wikipedia_id': '34086866', 'title': 'Pitch Perfect', 'start_paragraph_id': 4, 'start_character': 172, 'end_paragraph_id': 4, 'end_character': 184, 'bleu_score': 1.0, 'section': 'Section::::Plot.\n'}]}]