Question: "No puede ser" was sang in the 1990 concert of a popular operatic singing group whose first performance was on what date?

Related documents: [0]  [DOC] "No puede ser" (It cannot be) is an aria sung by Leandro (tenor) in the second act of the zarzuela, "La tabernera del puerto", composed by Pablo Sorozábal to a libretto by Federico Romero and Guillermo Fernández-Shaw. "La tabernera del puerto" premiered in Barcelona in 1936. One of the most famous arias in the Spanish language, "No puede ser" has been part of the concert repertoire of many Spanish tenors, including Alfredo Kraus, José Carreras and Plácido Domingo who sang it in the 1990 Three Tenors concert. [END] 
[1]  [DOC] The Three Tenors were a popular operatic singing group during the 1990s and early 2000s, consisting of Spaniards Plácido Domingo and José Carreras and the Italian Luciano Pavarotti. The trio began their collaboration with a performance at the ancient Baths of Caracalla in Rome, Italy on 7 July 1990, the eve of the 1990 FIFA World Cup Final. Zubin Mehta conducted the orchestra of Maggio Musicale Fiorentino and the orchestra of Teatro dell'Opera di Roma. The recording of this debut concert became the best-selling classical album of all time and led to additional performances and live albums. Around 1.3 billion viewers worldwide watched their second televised performance four years later at Dodger Stadium in Los Angeles. They last performed together at an arena in Columbus, Ohio on 28 September 2003. [END]  
Answer: 7 July 1990
7 July 1990