Question: Who has sold the most concert tickets ever?
Answer: U2
Disambiguated annotations:
qaPairs: question: Who has sold the most concert tickets ever in a single concert as of July 1, 2017?
answer: Il Blasco
Vasco
Vasco Rossi
question: Who has sold the most concert tickets ever in a single concert as of June 28, 2005?
answer: Bijelo Dugme
question: Who has sold the most concert tickets ever in a single concert as of July 31, 1999?
answer: Glay