Estonian Philharmonic Chamber Choir won the grammy Award for Best Choral Performance for two songs by a composer born in what year ?
Estonian Philharmonic Chamber Choir:  The group has been nominated for numerous Grammy Awards, and has won the Grammy Award for Best Choral Performance twice: in 2007 with Arvo Pärt's "Da pacem" and in 2014 with Pärt's "Adam's Lament", the latter was shared with Tui Hirv & Rainer Vilu, Sinfonietta Riga & Tallinn Chamber Orchestra; Latvian Radio Choir & Vox Clamantis. Arvo Pärt: Arvo Pärt (] ; born 11 September 1935) is an Estonian composer of classical and religious music.
1935