Vargas fell from power in 1945. Villa-Lobos was able, after the end of the war, to travel abroad again; he returned to Paris, and also made regular visits to the United States as well as travelling to Great Britain, and Israel. He received a huge number of commissions, and fulfilled many of them despite failing health. He composed concertos for piano, cello (the second one in 1953), classical guitar (in 1951 for Segovia, who refused to play it until the composer provided a cadenza in 1956), harp (for Nicanor Zabaleta in 1953) and harmonica (for John Sebastian, Sr. in 1955–6). Other commissions included his Symphony No. 11 (for the Boston Symphony Orchestra in 1955), and the opera "Yerma" (1955–56) based on the play by Federico García Lorca. His prolific output of this period prompted criticisms of note-spinning and banality: critical reactions to his Piano Concerto No. 5 included the comments "bankrupt" and "piano tuners' orgy", "raked the very depths of banality", "nothing ... but soupy textures or a bedraggled romantic idea", and "truly the kind of music that should never get written, still less performed".