Question: Do director of film Sweet Sweetback's Baadasssss Song and director of film David Copperfield (1969 film) share the same nationality?

<P0-S0> Sweet Sweetback's Baadasssss Song is a 1971 American independent action thriller film written, co-produced, scored, edited, directed by and starring Melvin Van Peebles. <P0-S1> His son Mario Van Peebles also appears in a small role, playing the title character as a young boy. <P0-S2> It tells the picaresque story of a poor black man on his flight from the white authority. <P0-S3> Van Peebles began to develop the film after being offered a three-picture contract for Columbia Pictures. <P0-S4> No studio would finance the film, so Van Peebles funded the film himself, shooting it independently over a period of 19 days, performing all of his own stunts and appearing in several sex scenes, some reportedly unsimulated. <P0-S5> He received a $50,000 loan from Bill Cosby to complete the project. <P0-S6> The film's fast-paced montages and jump-cuts were unique features in American cinema at the time. <P0-S7> The picture was censored in some markets, and received mixed critical reviews. <P0-S8> However, it has left a lasting impression on African-American cinema. <P0-S9> The musical score of "Sweet Sweetback's Baadasssss Song" was performed by Earth, Wind & Fire. <P0-S10> Van Peebles did not have any money for traditional advertising methods, so he released the soundtrack album prior to the film's release in order to generate publicity. <P0-S11> Initially, the film was screened only in two theaters in the United States. <P0-S12> It went on to gross $15.2 million at the box office. <P0-S13> Huey P. Newton celebrated and welcomed the film's revolutionary implications, and "Sweetback" became required viewing for members of the Black Panther Party. <P0-S14> According to "Variety", it demonstrated to Hollywood that films which portrayed "militant" blacks could be highly profitable, leading to the creation of the blaxploitation genre, although critic Roger Ebert, commenting on a review of the 2004 film about the making of this movie, did not consider this example of Van Peebles' work to be an exploitation film. <SEP> <P1-S0> Melvin" Block" Van Peebles( born August 21, 1932) is an American actor, filmmaker, playwright, novelist and composer. <P1-S1> He is most famous for creating( and starring in) the acclaimed film" Sweet Sweetback's Baadasssss Song", which heralded a new era of black- focused films. <P1-S2> He is the father of actor and director Mario Van Peebles. <SEP> <P2-S0> Ian Barry is an Australian director of film and TV. <SEP> <P3-S0> David Copperfield is a 1969 British American international co-production television film directed by Delbert Mann based on the novel of the same name by Charles Dickens adapted by Jack Pulman. <P3-S1> The film was made in the UK for 20th Century Fox Television with some exteriors filmed in Suffolk. <P3-S2> Some interior scenes were filmed at The Swan Hotel in Southwold. <P3-S3> The film starred Robin Phillips in the title role and Ralph Richardson as Micawber. <P3-S4> Among other well- known actors featured were Richard Attenborough, Laurence Olivier, Susan Hampshire, Cyril Cusack, Wendy Hiller, Edith Evans, Michael Redgrave and Ron Moody. <SEP> <P4-S0> Delbert Martin Mann Jr. (January 30, 1920 – November 11, 2007) was an American television and film director. <P4-S1> He won the Academy Award for Best Director for the film "Marty" (1955), adapted from a 1953 teleplay of the same name which he had also directed. <P4-S2> From 1967 to 1971, he was president of the Directors Guild of America. <P4-S3> In 2002, he received the DGA's honorary life member award. <P4-S4> Mann was credited to have "helped bring TV techniques to the film world." <SEP> <P5-S0> Hammer is a 1972 blaxploitation film directed by Bruce D. Clark. <P5-S1> The film was released following the successes of" Sweet Sweetback's Baadasssss Song" and" Shaft", notable 1971 films that popularized black cinema. <P5-S2> It starred Fred Williamson as B.J. Hammer. <P5-S3> Williamson went on to become a staple of the genre.