sentences:  Arvo Valton
  
  Arvo Vallikivi (born 14 December 1935 in Märjamaa), commonly known under the pen name of Arvo Valton, is an Estonian writer known for a number of books and, among other things, the script for Viimne reliikvia, the highly successful movie adaptation of Eduard Bornhöhe's Vürst Gabriel ehk Pirita kloostri viimsed päevad.In October 1980, Valton was a signatory of the Letter of 40 Intellectuals, a public letter in which forty prominent Estonian intellectuals defended the Estonian language and protested the Russification policies of the Kremlin in Estonia.