For 10 points, name this composer whose ballet Gayane features the "Sabre Dance," who hails from Armenia.
This composer called his second symphony a "requiem of wrath" because its third movement features the "Dies Irae" played on the strings at half-tempo and is partially based on the folk song "Brother Hunter" about a mother learning about her son's death. He notably used the flexatone in the "Andante con anima" movement of his piano concerto written in D-Flat Major, while his third symphony is written in only one movement and juxtaposes an organ with fifteen trumpets. His aforementioned second symphony is titled "A Bell" and he wrote suites based on Lope de Vega's The Valencian Widow and Lermontov's Masquerade. One of his best known pieces consists of quick alternations between major and minor sevenths and appears in a work featuring the "The Dance of the Pirates" and "The Dance of the Rose Maidens." The daughter of Avanes witnesses the death of Giko and helps entrap a spy trying to steal geological secrets in his ballet about a collective farm, which he wrote a decade before Spartacus. For 10 points, name this composer whose ballet Gayane features the "Sabre Dance," who hails from Armenia. 
This composer called his second symphony a "requiem of wrath" because its third movement features the "Dies Irae" played on the strings at half-tempo and is partially based on the folk song "Brother Hunter" about a mother learning about her son's death.
{Aram Khachaturian}