Question: Are Jack Bender and Roger Christian both film directors ?

Context paragraphs:
Bangladesh Film Directors Association: Bangladesh Film Directors Association is the pan-national trade body of film directors in Bangladesh.  The Bangladesh Film Directors Association’s General Secretary is Badiul Alam Khokon.  Mushfiqur Rahman Gulzar is the president of Bangladesh Film Directors Association.

A Tale of Two Cities (Lost): "A Tale of Two Cities" is the third season premiere, and 50th episode overall, of the American Broadcasting Company (ABC)'s serial drama television series "Lost".  The episode was written by co-creators/executive producers J. J. Abrams and Damon Lindelof, based on a story by Lindelof and directed by executive producer Jack Bender.  The episode begins with the introduction of Juliet Burke (Elizabeth Mitchell) and The Barracks.  The character of Jack Shephard (Matthew Fox) is featured in the episode's flashbacks.  This is the only episode of the series other than the pilot to have been co-written by J.J. Abrams.

Jack Bender: Jack Bender (born September 25, 1949) is an American television and film director, television producer and former actor best known for his work as a director on "Lost", "The Sopranos" and "Game of Thrones".

The Candidate (Lost): "The Candidate" is the 14th episode of the American Broadcasting Company's sixth season of the serial drama television series "Lost" and 117th episode overall.  The episode aired on May 4, 2010, on ABC in the United States.  The episode was written by Elizabeth Sarnoff and Jim Galasso and directed by Jack Bender.  The episode is centered on Jack Shephard and John Locke.

Man of Science, Man of Faith: "Man of Science, Man of Faith" is the first episode of the second season of "Lost" and the 26th episode overall.  The episode was directed by Jack Bender and written by Damon Lindelof.  It first aired on September 21, 2005, on ABC.  The flashbacks focus on Jack Shephard's struggle to heal Sarah, who would later become his wife.  In real time, John Locke and Kate Austen decide to enter the now-open shaft.

Through the Looking Glass (Lost): "Through the Looking Glass" is the third season finale of the ABC television series "Lost", consisting of the 22nd and 23rd episodes of the third season.  It is also the 71st and 72nd episodes overall.  It was written by co-creator/executive producer Damon Lindelof and executive producer Carlton Cuse, and directed by executive producer Jack Bender.  When first aired on May 23, 2007, in the United States and Canada, it was watched by an average of 14 million American viewers.  Like the previous two season finales, it was two hours long with advertisements, twice the length of a normal episode.  It was edited into two individual episodes when released on DVD.  The season finale is considered by some to be one of the best episodes of television ever broadcast.  The episode garnered a number of awards and nominations, including three Primetime Emmy Awards nominations and a Directors Guild of America Award nomination.

The Constant: "The Constant" is the fifth episode of the fourth season of the American Broadcasting Company's (ABC) serial drama television series "Lost", and the 77th episode overall.  It was broadcast on February 28, 2008, on ABC in the United States and on CTV in Canada.  It was written by executive producer Carlton Cuse and co-creator/executive producer Damon Lindelof and directed by executive producer Jack Bender.  "The Constant" was watched by 15 million American viewers and is widely regarded as one of "Lost"<nowiki>'</nowiki>s best episodes.  It was nominated for three Primetime Emmy Awards, a Directors Guild of America Award, and a Hugo Award.

One of Us (Lost): "One of Us" is the 16th episode of the third season of "Lost".  It aired on April 11, 2007, making it the 65th episode of the series.  The episode was written by Carlton Cuse and Drew Goddard and directed by Jack Bender.  The title of the episode is not only a reference to the season two episode titled "One of Them", it is also a major theme of the episode, as Jack tries to convince the other flight survivors that Juliet is "one of us", rather than an Other.

Lighthouse (Lost): "Lighthouse" is the fifth television episode of the American Broadcasting Company's sixth season of the serial drama television series "Lost" and 108th episode overall.  The episode aired on February 23, 2010, on ABC in the United States and 2 hours earlier on A in Canada due to the 2010 Winter Olympics.  The episode was written by showrunners and executive producers Damon Lindelof and Carlton Cuse and was directed by Jack Bender.  Jack Shephard is the character centered on this episode.

Roger Christian (filmmaker): Roger Christian (born 25 February 1944) is an English set decorator, production designer and feature film director.  He won an Academy Award for his work on the original "Star Wars" and was Oscar-nominated for his work on "Alien".  Christian directed the second unit on both "Return of the Jedi" and "" as well as feature films including "The Sender" and "Nostradamus".  He also directed the 2000 film "Battlefield Earth" which is regarded as one of the worst films ever made.

Supporting paragraphs: Jack Bender Roger Christian (filmmaker)
Answer: yes