Generate a question which can yield the answer mentioned in the input. Generated question must be answered by the answer provided in input, without using any extra knowledge.

Context : Children of the Street (German:Kinder der Strae) is a 1929 German silent film directed by Carl Boese and starring Lissy Arna, Heinrich George and Rudolf Biebrach.
Answer : Carl Boese
Who was the person who directed Children of the Street?