Background: Mario Lanza (born Alfredo Arnold Cocozza; January 31, 1921 - October 7, 1959) was an American tenor of Italian ancestry, and an actor and Hollywood film star of the late 1940s and the 1950s. Lanza began studying to be a professional singer at the age of 16. After appearing at the Hollywood Bowl in 1947, Lanza signed a seven-year film contract with Louis B. Mayer, the head of Metro-Goldwyn-Mayer, who saw his performance and was impressed by his singing.
Context: Lanza returned to an active film career in 1955 in Serenade, released by Warner Bros. However the film was not as successful as his previous films, despite its strong musical content, including arias from Der Rosenkavalier, Fedora, L'arlesiana, and Otello, as well as the Act I duet from Otello with soprano Licia Albanese. Ms. Albanese said of Lanza in 1980:  I had heard all sorts of stories about Mario [Lanza]. That his voice was too small for the stage, that he couldn't learn a score, that he couldn't sustain a full opera; in fact, that he couldn't even sing a full aria, that his recordings were made by splicing together various portions of an aria. None of it is true! He had the most beautiful lirico spinto voice. It was a gorgeous, beautiful, powerful voice. I should know because I sang with so many tenors. He had everything that one needs. The voice, the temperament, perfect diction. ... Vocally he was very secure. All he needed was coaching. Everything was so easy for him. He was fantastic!  He then moved to Rome, Italy in May 1957, where he worked on the film Seven Hills of Rome, and returned to live performing in November of that year, singing for Queen Elizabeth II at the Royal Variety Show at the London Palladium. From January to April 1958, Lanza gave a concert tour of the UK, Belgium, the Netherlands, France and Germany. He gave a total of 22 concerts on this tour, receiving mostly positive reviews for his singing. Despite a number of cancellations, which resulted from his failing health during this period, Lanza continued to receive offers for operatic appearances, concerts, and films.  In September 1958, he made a number of operatic recordings at the Rome Opera House for the soundtrack of what would turn out to be his final film, For the First Time. It was then that he came to the attention of that opera house's artistic director, Riccardo Vitale, who promptly offered the tenor carte blanche in his choice of operatic roles. Lanza also received offers to sing in any opera of his choosing from the San Carlo in Naples. At the same time, however, his health continued to decline, with the tenor suffering from a variety of ailments, including phlebitis and acute high blood pressure. His old habits of overeating and crash dieting, coupled with binge drinking, compounded his problems.
Question: when did the film come out?. Whats the answer?
1955