Question: who wrote the song it's a long way to the top
[{'answer': 'Angus Young', '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': 230, 'end_paragraph_id': 1, 'end_character': 241, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Malcolm Young', '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': 243, 'end_paragraph_id': 1, 'end_character': 256, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Bon Scott', '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': 261, 'end_paragraph_id': 1, 'end_character': 270, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'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': 11549460484919595845}, 'section': 'Section::::Abstract.'}]}]