Task: Question Generation
Input (English): Despite this glowing message by the Emperor, Chan writes that a year later in 1446, the Ming court cut off all relations with the Karmapa hierarchs. Until then, the court was unaware that Deshin Shekpa had died in 1415. The Ming court had believed that the representatives of the Karma Kagyu who continued to visit the Ming capital were sent by the Karmapa.
Output (English): When did  Deshin Shekpa  die?