Question: In the "Lost" episode "The Variable" Dr. Burke is being chased by whom?

Context paragraphs:
Elizabeth Mitchell: Elizabeth Mitchell (born Elizabeth Joanna Robertson: March 27, 1970) is an American actress known for her role as Dr. Juliet Burke on the ABC series "Lost".  She also had lead roles on the TV series "V" and "Revolution", as well as the Snow Queen on "Once Upon a Time" and as Deb Carpenter on "Dead of Summer".  Mitchell has starred in such films as "The Santa Clause" "2" & "", "Gia" and "".

Burke Ministry (Northern Territory): The Burke Ministry was the ministry of the sixth Chief Minister of the Northern Territory, Denis Burke.  It was sworn in on 9 February 1999, following the resignation of former Chief Minister Shane Stone the previous day.  While Stone told the media that his resignation was "pretty much" of his own timing and he wished to give the new CLP leader sufficient time to prepare for the 2001 election, it followed a meeting of backbenchers and some cabinet ministers advocating his removal.  Burke was elected unopposed as leader.  It was in office until 26 August 2001, when the Burke government lost the 2001 election to Clare Martin's Australian Labor Party.

Time Has Come Today (Grey's Anatomy): "Time Has Come Today" is the first episode of the third season of the American television medical drama "Grey's Anatomy", and the show's 37th episode overall.  Written by Shonda Rhimes and directed by Daniel Minahan, the episode aired on the American Broadcasting Company (ABC) in the United States on September 21, 2006.  The episode primarily focuses on Dr. Izzie Stevens (Katherine Heigl) coping with the unexpected death of her fiancé, Denny Duquette (Jeffrey Dean Morgan), while dealing with the decision to quit the internship program.  Further storylines include Dr. Preston Burke (Isaiah Washington) facing the repercussions of his being shot, and Dr. Meredith Grey (Ellen Pompeo) dealing with the aftermath of her affair with Dr. Derek Shepherd (Patrick Dempsey), which puts a strain in his already troubled marriage to Dr. Addison Montgomery-Shepherd (Kate Walsh).

The Variable: "The Variable" is the 14th television episode of the fifth season of "Lost", and the 100th episode overall.  It originally aired on the American Broadcasting Company (ABC) in the United States on April 29, 2009.  The hundredth episode milestone was celebrated by cast and crew on location in Hawaii.  In the episode, Daniel Faraday (Jeremy Davies) returns to the island in order to warn its inhabitants of a catastrophe involving the Dharma Initiative research station, .  Jack (Matthew Fox), Kate (Evangeline Lilly) and Daniel begin a gun fight with Dharma, leading Dharma to go after Sawyer (Josh Holloway) and Juliet (Elizabeth Mitchell).  In flashbacks, Daniel's relationship with his parents, Eloise Hawking (Fionnula Flanagan) and Charles Widmore (Alan Dale), is shown.

Burke County Public Schools: Burke County Public Schools is the public K-12 school system in Burke County, NC.  The superintendent of Burke County Public Schools (BCPS) is Mr. Larry Putnam.  Larry Putnam was elected into office with a 7-0 vote by the Burke County School Board on April 17, 2011.  He preceded Dr. Arthur Stellar, who had become the superintendent of BCPS on September 29, 2009 when, by a majority vote of the Board of Education, was offered a four-year contract.  Dr. Stellar replaced former superintendent David Burleson, who on June 30, 2009 was paid off by the Board of Education, ending a 27-year career in Burke County Schools.  Upon leaving Burke County, David Burleson found a job as principal of North Forsyth High School in Winston-Salem, North Carolina.

Albert Burke (tennis): Albert Burke (1901 – 1958) was an Irish professional tennis player based in France.  Albert Burke was the son of Thomas Burke.  Thomas Burke was a professional tennis player when professional tennis began in the late 19th century and Albert Burke's brother Edmund Burke was also a professional tennis player .  Albert Burke won the Bristol Cup in France (the top professional tournament in the world in the 1920s), in 1924 and 1925 (beating Roman Najuch in both finals) .  He was also losing finalist in the Bristol Cup in 1926, 1929 and 1931 (losing all three finals to Karel Kozeluh) .  Burke finished second in the 1930 French Pro Championship round robin (Karel Kozeluh was first) .  At the US Pro Tennis Championships Burke was a quarter finalist in 1931 (losing to Howard Kinsey) and 1932 (losing to Bill Tilden) .  At the Wembley Championships Burke lost in the quarter finals in 1935 (losing to Ellsworth Vines) .

Safe (2012 film): Safe is a 2012 American action crime thriller film written and directed by Boaz Yakin and starring Jason Statham, Chris Sarandon, Robert John Burke and James Hong.  Statham plays an ex-cop and former cage fighter who winds up protecting a gifted child who is being chased by the Russian mafia, Chinese Triads, and corrupt New York City police.

The Doctor and the Devils: The Doctor and The Devils is a gothic thriller produced by Mel Brooks' production company Brooksfilms and released in 1985.  It is based upon the true story of Burke and Hare, who in 1828 Edinburgh, Scotland, murdered at least 16 people and sold their bodies for anatomical dissection.  The film stars Timothy Dalton as Dr. Thomas Rock (a character based on the real-life Dr. Knox, to whom Burke and Hare supplied bodies) and features Jonathan Pryce and Stephen Rea as Fallon and Broom, characters based upon Burke and Hare.  The film was directed by Freddie Francis, and features a script adapted by Sir Ronald Harwood from an unproduced screenplay by Dylan Thomas.

Losing My Religion (Grey's Anatomy): "Losing My Religion" is the twenty-seventh and final episode of the second season of the American television medical drama "Grey's Anatomy", and the show's 36th episode overall.  Written by Shonda Rhimes and directed by Mark Tinker, the episode was originally broadcast with "Deterioration of the Fight or Flight Response", in a two-hour season finale event on the American Broadcasting Company (ABC) in the United States on May 15, 2006.  "Grey's Anatomy" centers around a group of young doctors in training.  In this episode, Dr. Izzie Stevens (Katherine Heigl) and her fellow interns have to plan a prom for Dr. Richard Webber's (James Pickens, Jr.) niece Camille Travis (Tessa Thompson).  Further storylines include Dr. Preston Burke (Isaiah Washington) recovering from his gunshot wound and Denny Duquette's (Jeffrey Dean Morgan) death following his seemingly successful heart transplant surgery.

Great Expectations (Grey's Anatomy): "Great Expectations" is the thirteenth episode of the third season of the American television medical drama "Grey's Anatomy", and the show's 49th episode overall.  It was written by Eric Buchman and directed by Michael Grossman.  The episode aired on the American Broadcasting Company (ABC) in the United States on January 25, 2007.  In the episode, Dr. Derek Shepherd (Patrick Dempsey), Dr. Preston Burke (Isaiah Washington), Dr. Addison Montgomery (Kate Walsh), and Dr. Mark Sloan (Eric Dane) struggle to be considered for the position of chief of surgery after Dr. Richard Webber (James Pickens, Jr.) announces his plans for retirement.  Further storylines include Dr. George O'Malley (T.R. Knight) mourning his father, Dr. Miranda Bailey (Chandra Wilson) trying to get financial support for a free clinic, and Dr. Cristina Yang (Sandra Oh) dealing with her troubled relationship with Burke.

Supporting paragraphs: The Variable Elizabeth Mitchell
Answer: the Dharma Initiative