Question: who sings it's a long way to the top
[{'answer': 'AC / DC', 'provenance': [{'wikipedia_id': '4592491', 'title': "It's a Long Way to the Top (If You Wanna Rock 'n' Roll)", 'start_paragraph_id': 25, 'start_character': 114, 'end_paragraph_id': 25, 'end_character': 125, 'bleu_score': 1.0, 'section': 'Section::::Popularity.\n'}]}, {'provenance': [{'wikipedia_id': '4592491', 'title': "It's a Long Way to the Top (If You Wanna Rock 'n' Roll)", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 503, 'bleu_score': 0.880822638431321, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12264694265096556468}, 'section': 'Section::::Abstract.'}]}]