question: What is the place of birth of the director of film Love On The Cloud?
context: [["Natasha Cloud", ["Natasha Cloud( born February 22, 1992) is an American professional basketball player for the Washington Mystics of the Women's National Basketball Association( WNBA)."]], ["Peter Levin", ["Peter Levin is an American director of film, television and theatre."]], ["Love on the Cloud", ["Love on the Cloud  is a 2014 Chinese romantic comedy film directed by Gu Changwei.", "It was released on December 24."]], ["Michael Cloud", ["Michael Jonathan Cloud( born May 13, 1975) is an American politician currently serving as a member of the United States House of Representatives for Texas's 27th congressional district.", "He is a member of the Republican Party."]], ["Ian Barry (director)", ["Ian Barry is an Australian director of film and TV."]], ["Tavoris Cloud", ["Tavoris Karod Cloud( born January 10, 1982) is an American former professional boxer who competed from 2004 to 2014, and held the IBF light heavyweight title from 2009 to 2013."]], ["Rodney St. Cloud", ["Rodney St. Cloud( born December 3, 1973)( age 45) is a retired American professional bodybuilder."]], ["Susan Deer Cloud", ["Susan Deer Cloud( born October 20, 1950), a mixed lineage Catskill Native, is an award- winning writer of poetry, fiction, and creative essays."]], ["Suzanne Cloud", ["Suzanne Cloud( born September 7, 1951) is an American jazz singer, writer, and teacher."]], ["Gu Changwei", ["Gu Changwei (born 12 December 1957) is a Chinese cinematographer and film director.", "Gu was born in Xi'an, Shaanxi in the People's Republic of China.", "Gu is considered one of the major Chinese cinematographers working today."]]]
supporting_facts: [["Love on the Cloud", 0], ["Gu Changwei", 1]]
evidences: [["Love on the Cloud", "director", "Gu Changwei"], ["Gu Changwei", "place of birth", "Xi'an"]]
answer: Xi'an