Definition: Generate a correct and concise answer for the question based on the words in the context.
Input: Context : Jaroslav Safranek (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.
Question : The date of death for Jaroslav Safranek is what?
Output:
1957