Question: Sky and Sand is a song by German electronic music producers Paul Kalkbrenner and Fritz Kalkbrenner, the song was originally produced as the title song of which 2008 German tragicomedy directed by Hannes Stöhr?
Sentence (from "Sky and Sand"): The song was originally produced as the title song of the German movie Berlin Calling written and directed by Hannes Stöhr .
Relevant evidence: Yes