Task: Question Generation
Input (English): Context : Jaroslav Šafránek (1890-1957) was a Czech physicist who, in the second half of the 1930s, designed a system for the transmission of visual images by low-line mechanical television, which made the production of an authentic spatial impression of the picture, transmitted on the screen, possible. 
Answer : 1957
Output (English): The date of death for Jaroslav Šafránek is what?