Question: Where did the director of film Soul On A String graduate from?
Sentence (from "Soul on a String"): Soul on a String (Tibetan: རྒྱུད་སྐུད་སྟེང་གི་རྣམ་ཤེས) is a 2016 Chinese Tibetan-language adventure film directed by Zhang Yang and co-written by Zhang Yang and Tashi Dawa, based on Tashi Dawa's short stories "Souls Tied to the Knots on a Leather Cord" and "On the Road to Lhasa" .
Relevant evidence: Yes