Task: Question Answering
Input (English): Passage: In the second act of Tosca, according to Newman, Puccini rises to his greatest height as a master of the musical macabre. The act begins quietly, with Scarpia musing on the forthcoming downfall of Angelotti and Cavaradossi, while in the background a gavotte is played in a distant quarter of the Farnese Palace. For this music Puccini adapted a fifteen-year-old student exercise by his late brother, Michele, stating that in this way his brother could live again through him. In the dialogue with Spoletta, the "torture" motif—an "ideogram of suffering", according to Budden—is heard for the first time as a foretaste of what is to come. As Cavaradossi is brought in for interrogation, Tosca's voice is heard with the offstage chorus singing a cantata, "[its] suave strains contrast[ing] dramatically with the increasing tension and ever-darkening colour of the stage action". The cantata is most likely the Cantata a Giove, in the literature referred to as a lost work of Puccini's from 1897.Osborne describes the scenes that follow—Cavaradossi's interrogation, his torture, Scarpia's sadistic tormenting of Tosca—as Puccini's musical equivalent of grand guignol to which Cavaradossi's brief "Vittoria! Vittoria!" on the news of Napoleon's victory gives only partial relief. Scarpia's aria "Già, mi dicon venal" ("Yes, they say I am venal") is closely followed by Tosca's "Vissi d'arte". A lyrical andante based on Tosca's act 1 motif, this is perhaps the opera's best-known aria, yet was regarded by Puccini as a mistake; he considered eliminating it since it held up the action. Fisher calls it "a Job-like prayer questioning God for punishing a woman who has lived unselfishly and righteously". In the act's finale, Newman likens the orchestral turmoil which follows Tosca's stabbing of Scarpia to the sudden outburst after the slow movement of Beethoven's Ninth Symphony. After Tosca's contemptuous "E avanti a lui tremava tutta Roma!" ("All Rome trembled before him"), sung on a middle C♯ monotone  (sometimes spoken), the music gradually fades, ending what Newman calls "the most impressively macabre scene in all opera." The final notes in the act are those of the Scarpia motif, softly, in a minor key. 
Question: What is the name of the aria Puccini considered eliminating because it held up the action?
Output (English): Vissi d'arte.