Question: Who's the father of the director of From the Sky Down?

full_context: Document 1: Don Philippi: Born in Los Angeles, Philippi studied at the University of Southern California before going to Japan in 1957 on a Fulbright scholarship to study at the Kokugakuin University. In Japan he became an expert in both classical Japanese and Ainu.
Document 2: Davis Guggenheim: He was born Philip Davis Guggenheim in St. Louis, Missouri, United States, the son of Marion Davis (née Streett) and film director and producer Charles Guggenheim. His father was Jewish, whereas his mother was Episcopalian. He graduated from the Potomac School (McLean, Virginia) (1979), from Sidwell Friends School (1982), and from Brown University (1986).
Document 3: Shine a Light (film): Shine a Light is a 2008 British-American concert film directed by Martin Scorsese documenting The Rolling Stones' 2006 Beacon Theatre performances on their A Bigger Bang Tour. The film also includes archive footage from the band's career and marked the first utilisation by Scorsese of digital cinematography for his films, with it being used for the backstage sequences. The film takes its title from the song of the same name, featured on the band's 1972 album "Exile on Main St." A soundtrack album was released in April 2008 on the Universal label. This is also the last movie by Paramount Classics, as the company merged into its sister company Paramount Vantage after the movie was released.
Document 4: Glastonbury (film): Glastonbury is a 2006 rockumentary film directed by Julien Temple which details the history of the Glastonbury Festival from 1970 to 2005. It is the third attempt to make a film about the festival. The film is made up of footage shot by Temple at the festival in 2002, 2003, 2004 and 2005, as well as footage sent in by festival goers after a request on websites and newspapers for footage. Temple had initially only agreed to make a film of the 2002 festival after organiser Michael Eavis expressed concern that that would be the last year of the festival. Temple then realised that he wanted to make a film detailing the full history of the festival. The film also includes footage shot by Channel 4 and the BBC during their coverage of the festival since 1994.
Document 5: The Story of Wish You Were Here: The Story of Wish You Were Here is a direct-to-video documentary about the making of "Wish You Were Here" album by Pink Floyd. After being shown on a few television channels, such as BBC Four, it was released on 26 June 2012, on DVD and Blu-ray.
Document 6: From the Sky Down: From the Sky Down is a 2011 American documentary film directed by Davis Guggenheim about rock band U2 and the production of their 1991 album "Achtung Baby". The film documents the album's difficult recording period, the band members' relationships, and the group's creative process. Guggenheim, who was commissioned by U2 to create the film to commemorate the record's 20th anniversary, spent several months in 2011 developing the documentary. The band were filmed during a return visit to Hansa Studios in Berlin where parts of the album were recorded, and during rehearsals in Winnipeg for the Glastonbury Festival 2011. The film contains unreleased scenes from the group's 1988 motion picture "Rattle and Hum", along with archival footage and stills from the "Achtung Baby" recording sessions. Development of the album's emblematic song "One" is recounted through the replaying of old recording tapes.
Document 7: Laughlin Phillips: Laughlin Phillips, nicknamed Loc, was born in Washington, D.C. in 1924, the son of Duncan Phillips, an art collector and critic, and Marjorie Acker Phillips, a painter. He had one sibling, Mary Marjorie, born in 1922, who contracted encephalitis at a young age and was institutionalized. According to Phillips, "she was severely brain damaged and never got beyond being four years old." Phillips was named after his great-grandfather, James H. Laughlin, co-founder of the Jones and Laughlin Steel Company and chair of the Pittsburgh National Bank (a precursor to PNC Financial Services). Three years prior to Phillips' birth, Duncan and Marjorie founded the Phillips Memorial Gallery, the United States' first museum of modern art. The museum was located in the Phillips' home, a Georgian Revival house in Dupont Circle where Laughlin spent his early childhood. In 1930, the family moved to another house, Dunmarlin, a mansion on Foxhall Road NW designed by architect John Russell Pope, to increase the museum's gallery space. During his childhood, Dunmarlin was a noted meeting place for diplomats, politicians and artists. Phillips attended special events and exhibits, including a photography exhibit where his own work was displayed. He was chauffeured each day to St. Albans School, an elite private school where he graduated in 1942.
Document 8: Steven Spielberg: Spielberg was born in Cincinnati, Ohio, to an Orthodox Jewish family. His mother, Leah (Adler) Posner (born 1920), was a restaurateur and concert pianist, and his father, Arnold Spielberg (born 1917), was an electrical engineer involved in the development of computers. His paternal grandparents were immigrants from Ukraine who settled in Cincinnati in the first decade of the 1900s. In 1950, his family moved to Haddon Township, New Jersey when his father took a job with RCA. Three years later, the family moved to Phoenix, Arizona.:548 Spielberg attended Hebrew school from 1953 to 1957, in classes taught by Rabbi Albert L. Lewis.
Document 9: 20 Feet from Stardom: 20 Feet from Stardom is a 2013 American documentary film directed by documentary filmmaker Morgan Neville and was produced by Gil Friesen, a music industry executive whose curiosity to know more about the lives of background singers inspired the making of the film.
Document 10: Philip Carr-Gomm: Philip Carr-Gomm was born in London, raised in Notting Hill Gate, and educated at Westminster School and University College London. His father was Francis Eardley Carr-Gomm, brother of humanitarian Richard Carr-Gomm.
Document 11: Metallica: This Monster Lives: The book follows the emotional roller-coaster both he and his film partner Bruce Sinofsky and the band Metallica went through during the creation film. The book takes in the time from Berlinger and Sinofsky's first meeting with Metallica in 1999 to the 2003 Summer Sanitarium Tour. Berlinger and Sinofsky's relationship was at an all time low, exacerbated by Berlinger's decision to direct the disastrous sequel to the Blair Witch. At the start of filming the relationship between the band members, especially between vocalist James Hetfield and drummer Lars Ulrich, is in a similarly perilous position after bassist Jason Newsted quit the band and long standing grudges between the remaining members threaten to escalate past the point of no return.
Document 12: Daniel Pipes: The son of Irene (née Roth) and Richard Pipes, Daniel Pipes was born in Boston, Massachusetts, in 1949. His parents had each fled German-occupied Poland with their families, and they met in the United States. His father, Richard Pipes, was a historian at Harvard University, specializing in Russia, and Daniel Pipes grew up primarily in the Cambridge, Massachusetts area.
Document 13: Gavrik Losey: Gavrik was born in New York, the son of film director Joseph Losey and fashion designer Elizabeth Hawes. He attended the Little Red SchoolHouse in Manhattan, Poughkeepsie Day School in Poughkeepsie, and high school in New Jersey. After graduating, he travelled with his blacklisted father to England where he attended University College London.
Document 14: Kidada Jones: The elder daughter of composer/arranger Quincy Jones and actress Peggy Lipton, Jones was born in Los Angeles, California. Jones was raised in Bel-Air with her younger sister Rashida, who is now an actress and screenwriter. Jones attended the Los Angeles Fashion Institute for Design and Merchandising and left at age 19 to work with the designer Tommy Hilfiger. She is Jewish on her mother's side, and African-American on her father's side. Lipton's parents were Harold Lipton (1911–1999), a corporate lawyer, and Rita Benson (1912–1986), an artist.
Document 15: Sing Blue Silver: Sing Blue Silver is a documentary about Duran Duran's 1983-1984 World Tour directed by Michael Collins. A sixty-minute edited version of the documentary was aired on MTV (and later other music channels) under the title Blue Silver.
ground_truth: Charles Guggenheim
sub_queries: From the Sky Down >> director Answer: Davis Guggenheim
The father of Davis Guggenheim is whom? Answer: Charles Guggenheim