Task: Question Generation
Input (English): Context : Tögs-Ochiryn Namnansüren (Mongolian: Төгс-Очирын Намнансүрэн; Chinese: 那木囊蘇倫; Tibetan: རྣམ་སྣང་སྲུང་།; 1878 -- April 1919), full title Sain Noyon Khan Namnansüren (Сайн ноён хан Намнансүрэн, Good noyon khan Namnansüren), was a powerful hereditary prince and prominent early 20th century Mongolian independence leader. 
Answer : April 1919
Output (English): What date did Tögs-Ochiryn Namnansüren die on?