Question: who are the members of the band u2
[{'answer': 'Bono', 'provenance': [{'wikipedia_id': '52780', 'title': 'U2', 'start_paragraph_id': 1, 'start_character': 77, 'end_paragraph_id': 1, 'end_character': 81, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'The Edge', 'provenance': [{'wikipedia_id': '52780', 'title': 'U2', 'start_paragraph_id': 21, 'start_character': 588, 'end_paragraph_id': 21, 'end_character': 596, 'bleu_score': 1.0, 'section': 'Section::::History.:"The Unforgettable Fire" and Live Aid (1984–1985).\n'}]}, {'answer': 'Adam Clayton', 'provenance': [{'wikipedia_id': '52780', 'title': 'U2', 'start_paragraph_id': 1, 'start_character': 170, 'end_paragraph_id': 1, 'end_character': 182, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Larry Mullen Jr.', 'provenance': [{'wikipedia_id': '52780', 'title': 'U2', 'start_paragraph_id': 1, 'start_character': 202, 'end_paragraph_id': 1, 'end_character': 218, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]