Question: Marcello Giordan is sometimes confused with what artist that toured with Russian operatic soprano Anna Netrebko in 2009?
Sentence (from "Marcello Giordani"): Marcello Giordani (birth name Marcello Guagliardo; born 25 January 1963) is an Italian operatic tenor who has sung leading roles in opera houses throughout Europe and the United States.
Relevant evidence: No