Question: What is the place of birth of the director of film Helicopter String Quartet?
Sentence (from "Frank Scheffer"): Frank Scheffer (born 1956 in Venlo) is a Dutch cinematographer and producer of documentary film, mostly known for his work "Conducting Mahler" (1996) on the 1995 Mahler Festival in Amsterdam with Claudio Abbado,
Relevant evidence: Yes