Question: Who is the mother of the director of A Child is Waiting?

full_context: Document 1: 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 2: James De La Vega: James De La Vega was born in East Harlem, the son of Jaime De La Vega and Elsie Matos, and graduated valedictorian at York Preparatory School and attended Cornell University, where he graduated in 1994 with a Bachelor of Fine Arts. He is a former art teacher at York Preparatory School.
Document 3: David Kassan: David Kassan received his B.F.A. in 1999 from the College of Visual and Performing Arts at Syracuse University, Syracuse, NY. He continued his studies at The National Academy, and the Art Students League of New York, both in Manhattan
Document 4: I'm Almost Not Crazy: John Cassavetes, the Man and His Work: I'm Almost Not Crazy: John Cassavetes, the Man and His Work is a 1989 American documentary directed by Michael Ventura and starring John Cassavetes.
Document 5: John Cassavetes: Cassavetes was born in New York City, the son of Greek American Katherine Cassavetes (née Demetre), who was to be featured in some of his films, and Greek immigrant Nicholas John Cassavetes; in Greek, his name is Ιωάννης Νικόλαος Κασσαβέτης. His early years were spent with his family in Greece; when he returned at age seven, he spoke no English. He was reared on Long Island, New York. He attended Port Washington High School from 1945 to 1947 and participated in "Port Weekly" (the school paper), "Red Domino" (interclass play), football, and the "Port Light" (yearbook). Next to his photo on page 55 of his 1947 yearbook is written: "'Cassy' is always ready with a wisecrack, but he does have a serious side. A 'sensational' personality. Drives his 'heap' all over." Cassavetes attended Blair Academy in New Jersey and spent a semester at Champlain College before being expelled due to his failing grades. He spent a few weeks hitchhiking down to Florida and transferred to the American Academy of Dramatic Arts after running into friends who had just enrolled, stating the school was packed with girls, encouraging Cassavetes to enroll. He graduated in 1950 and met his future wife Gena Rowlands at her audition into the Academy in 1953 and they were married four months later in 1954. He continued acting in the theater, took small parts in films and began working on television in anthology series, such as "Alcoa Theatre".
Document 6: Aroldo Tieri: Born in Corigliano Calabro, son of the journalist and playwright Vincenzo Tieri, Aroldo Tieri moved in Rome at 18 to study law at university, and in the meanwhile approached acting and enrolled the Accademia Nazionale di Arte Drammatica Silvio D'Amico. Graduated in 1938, he almost immediately made his debut in theater and in film. Soon Tieri became one of the most popular and appreciated young actors, with a predisposition to the comic genre. In cinema Tieri specialized in roles on jealous, irascible, nervous boyfriends, and this characterization limited his career and caused his retirement from films in the late 1960s. His versatility was revealed especially on stage and on television, that at the end of the 1950s gave him notoriety with a successful adaptation of the Dickens' novel "Nicholas Nickleby" and then as host of "Canzonissima" in 1960. Companion for many years on the scene of the actress Giuliana Lojodice, later his wife, Tieri formed a stage company with her in 1965 and the couple was very active in multiple projects at theater, radio and TV.
Document 7: Johnny Depp: Depp was born in Owensboro, Kentucky, the youngest of four children of Betty Sue Palmer (née Wells), a waitress, and John Christopher Depp, a civil engineer.  Depp moved frequently during his childhood. He and his siblings lived in more than 20 different places, eventually settling in Miramar, Florida in 1970. Depp's parents divorced in 1978 when he was 15. His mother married Robert Palmer, whom Depp has called "an inspiration".With the gift of a guitar from his mother when he was 12, Depp began playing in various garage bands. A year after his parents' divorce, he dropped out of Miramar High School to become a rock musician. He attempted to go back to school two weeks later, but the principal told him to follow his dream of being a musician. He played with The Kids, a band that enjoyed modest local success. The Kids set out together for Los Angeles in pursuit of a record deal, changing their name to Six Gun Method, but the group split up before signing a record deal. Depp subsequently collaborated with the band Rock City Angels and co-wrote their song "Mary", which appeared on Rock City Angels' debut Geffen Records album Young Man's Blues. On December 20, 1983, Depp married Lori Anne Allison, the sister of his band's bass player and singer. During their marriage she worked as a makeup artist while he worked a variety of odd jobs, including a telemarketer for pens. His wife introduced him to actor Nicolas Cage, who advised him to pursue an acting career. Depp and Allison divorced in 1985.
Document 8: You're a Big Boy Now: You're a Big Boy Now is a 1966 American comedy film about an upper-middle-class young man's coming of age in 1960s Manhattan written and directed by Francis Ford Coppola. Based on David Benedictus' 1963 novel of the same name, it stars Elizabeth Hartman, Peter Kastner, Geraldine Page, Rip Torn, Karen Black, and Julie Harris.
Document 9: Ines Cassettari: Ines Cassettari (died 1943) was an Italian emigrant to America whose autobiography became famous. She was born in 1866 or 1867 in Lombardy, Italy, and abandoned at birth, and lived in an orphanage and then a foster home. She was forced to marry an abusive man. They immigrated to the United States, where she refused to run a brothel for him and eventually left him. She remarried and worked as a cleaning woman in the Chicago Commons until she died.
Document 10: Children Without: Children Without is a 1964 American short documentary film directed by Charles Guggenheim, about a young girl and her brother growing up in the housing projects of Detroit. It was nominated for an Academy Award for Best Documentary Short, losing to another film by Guggenheim, "Nine from Little Rock".
Document 11: Bigger Than Life: Bigger Than Life is an American DeLuxe Color CinemaScope drama film made in 1956 directed by Nicholas Ray and starring James Mason, who also co-wrote and produced the film, about a school teacher and family man whose life spins out of control upon becoming addicted to cortisone. The film co-stars Barbara Rush as his wife and Walter Matthau as his closest friend, a fellow teacher. Though it was a box-office flop upon its initial release, many modern critics hail it as a masterpiece and brilliant indictment of contemporary attitudes towards mental illness and addiction. In 1963, Jean-Luc Godard named it one of the ten best American sound films ever made.
Document 12: The Carnival Man: The film is fifteen minutes long and it is the first-ever film appearance of Huston, the father of actor and director John Huston and grandfather of actress Anjelica Huston. The female lead was Ninetta (Nan) Sunderland, who would marry her Walter Huston in 1931. It was filmed Paramount Studios and Kaufman Astoria Studios, both in New York City.
Document 13: Searching for Bobby Fischer: Searching for Bobby Fischer, released in the United Kingdom as Innocent Moves, is a 1993 American drama film written and directed by Steven Zaillian. The film was Zaillian's directorial debut, and stars Max Pomeranc, Joe Mantegna, Joan Allen, Ben Kingsley and Laurence Fishburne. It is based on the life of prodigy chess player Joshua Waitzkin, played by Pomeranc, and adapted from the book of the same name by Joshua's father Fred.
Document 14: A Child Is Waiting: A Child Is Waiting is a 1963 American drama film written by Abby Mann based on his 1957 "Westinghouse Studio One" teleplay of the same name. The film was produced by Stanley Kramer and directed by John Cassavetes. Burt Lancaster portrays the director of a state institution for mentally handicapped and emotionally disturbed children, and Judy Garland is a new teacher who challenges his methods.
Document 15: Faces (1968 film): Faces is a 1968 drama film, written and directed by John Cassavetes, and starring John Marley, Cassavetes' wife Gena Rowlands, Fred Draper, Seymour Cassel, and Lynn Carlin. In 2011, it was added to the National Film Registry of the Library of Congress.
ground_truth: Katherine Cassavetes
sub_queries: A Child Is Waiting >> director Answer: John Cassavetes
Who is the mother of John Cassavetes ? Answer: Katherine Cassavetes