Question: Which director is best known for their non-fiction films, Len Wiseman or Lilibet Foster?

Context paragraphs:
Vanessa Roth: Vanessa Roth is an American filmmaker who writes, produces and directs non-fiction films and heads up social issue reform efforts through storytelling.  She has won a number of film awards for her works, including a 2008 Academy Award for Best Short Documentary for Freeheld, an Alfred I duPont-Columbia award for "Taken In: The Lives of America's Foster Children", two Sundance Special Jury Prizes, Cine Golden Eagles, Casey Medals and a MacArthur Grant.  Some of her award-winning films include "Close to Home", "Aging Out", "Schools of the 21st Century", "The Third Monday in October", "9/11’s Toxic Dust", "No Tomorrow", "The Other Side" and "American Teacher".  and "The Texas Promise".  She is the Executive Producer and Director of "Daughters of Destiny The Journey of Shanti Bhavan" - a 4 part Netflix Original documentary series to be released July 28 2017.

Underworld: Endless War: Underworld: Endless War is a collection of three short, tie-in stories whose creation was supervised by Len Wiseman, director of the first two "Underworld" films.  Each film tells a different story, and at different periods of history to highlight new events of the Underworld mythology.  These stories also tell of what happened before the events in .

Face Off (TV series): Face Off is an American reality television game show on the Syfy cable network in which a group of prosthetic makeup artists compete against each other to create prostheses such as those found in science fiction and horror films. Each episode features one or more challenges, with the work reviewed by a panel of judges and eliminating one or more artists each week until a final winner is chosen.  Actress McKenzie Westmore, known for her role as Sheridan Crane on the former NBC/DirecTV soap opera "Passions" and a member of the Westmore family of makeup artists, serves as the show's host.  For each assignment, the contestants' work is individually evaluated by a panel of professional special effects makeup artists who serve as judges.  These judges have included Academy Award-winning makeup artist Ve Neill, and television and film makeup artist Glenn Hetrick, creature designer and director Patrick Tatopoulos (Season 1 - 3), and Neville Page (Season 3 - present).  Industry figures and artists including Brian Grazer, Kevin Smith, Paul W. S. Anderson, Greg Nicotero, Rick Baker, Doug Jones, Len Wiseman and Gale Anne Hurd have served as guest judges.

Ralph Keene: Ralph Keene (1902–1963) was an Indian-born British screenwriter, producer and film director.  He is generally known for his work on documentaries.  Following the Second World War he shot a number of non-fiction films outside Britain including in Cyprus, Ceylon and Persia.

Tony Daniels: Tony Daniels (born January 23, 1963 in Toronto, Ontario) is a Canadian voice actor.  He is well known for providing the voices of Uncle Flippy in JoJo's Circus and Wiseman in the "Sailor Moon" metaseries, but probably best known for providing the voice of Gambit in "X-Men: The Animated Series" and "Marvel vs. Capcom" series.  He also provides voices for CBC News Network and appeared on camera in such shows and films as "Code Name: Eternity", "Gracie's Choice", "Get Ed" and "Eerie, Indiana: The Other Dimension".

Lilibet Foster: Lilibet Foster is an American director, producer and writer.  Her non-fiction films have won the Independent Spirit: Truer Than Fiction Award and been Nominated for Best Film of the Year by the International Documentary Association.

Brent Foster (director): Brent Foster is a Canadian film director best known for bringing out authentic performances on screen—often casting real characters as the subjects of his films.  His project "While I'm Here", a collection of individual stories following everyday heroes, has gone viral on several platforms and earned Foster wide recognition and success.

Ted Lune: Ted Lune (born Harold Garnett, 18 August 1920, Ainsworth, Lancashire; died 7 January 1968, Selsey, Sussex) was a British actor, best known for portraying Private Len Bone in the TV series "The Army Game".  He also worked in radio comedy and appeared in a couple of films.

Foz Foster: James 'Foz' Foster (born 1960) is a composer and multi-instrumentalist.  He is best known as the lead guitarist in the art-rock band, David Devant and his Spirit Wife, and in the 1983-5 incarnation of The Monochrome Set.  Foster also plays guitar, musical saw and vibraslap in the house band of Karaoke Circus and occasional saw in Martin White's Mystery Fax Machine Orchestra.  He plays ukulele and other instruments as part of the double-act, Foster and Gilvan, and is also musical director of Sawchestra – a band of musical saw players who perform Foster's compositions to accompany silent films.

Len Wiseman: Len Ryan Wiseman (born March 4, 1973) is an American film director, screenwriter and producer.  He is best known for his work on the "Underworld" series, "Live Free or Die Hard", and the 2012 film "Total Recall".

Supporting paragraphs: Len Wiseman Lilibet Foster
Answer: Lilibet Foster