Question: Another Earth starred the actress who was in what 2004 documentary?

Context paragraphs:
Power Girl: In common with Supergirl's origin story, she is the daughter of Superman's aunt and uncle and a native of the planet Krypton.  The infant Power Girl's parents enabled her to escape the destruction of her home planet by placing her in a rocket ship.  Although she left the planet at the same time that Superman did, her ship took much longer to reach Earth-Two.  On Earth, as with other Kryptonians, Power Girl discovered she possessed abilities like super strength, flight, and heat vision, using which she became a protector of innocents and a hero for humanity.  Though the specifics of how vary over subsequent retellings, Power Girl is later stranded on another Earth when a cosmic crisis affects her home of Earth-Two, and later carves out a separate identity for herself from her dimensional counterpart Supergirl once they are forced to coexist.

Genesis (2004 film): Genesis is a 2004 documentary film written and directed by Claude Nuridsany and Marie Pérennou that explores the origins of earth and its inhabitants.  The film focuses on the life of many animals.  It is narrated by Sotigui Kouyaté.

Brit Marling: Brit Heyworth Marling (born August 7, 1982) is an American actress, screenwriter and film producer.  She first gained recognition in 2004 with the documentary "Boxers and Ballerinas" and later became a Sundance star with the Searchlight films "Sound of My Voice" (2011), "Another Earth" (2011) and "The East" (2013) which she co-wrote in addition to playing the lead role.  She starred in the 2016 Netflix series "The OA", which she co-created with Zal Batmanglij.

Trollywood (film): Trollywood is a 2004 documentary film about homelessness, directed by first-time British filmmaker Madeleine Farley, previously an artist and cartoonist.  The film was nominated for Best Documentary at the British Independent Film Awards 2004  (but lost to "Touching the Void"), but won for Best Documentary at the Cinemanila International Film Festival.

Ma Fleur: Ma Fleur ("my flower", in French) is the fourth full-length release and third proper studio album by The Cinematic Orchestra, released on 7 May 2007.  The North American version of the album contains 10 tracks in a different sequence from the UK version and omits "Child Song".  The song "To Build a Home" was used in an award winning 2008 Schweppes Lemonade advertisement called "Burst" and in the 2010 Australian-French film The Tree, and the similar shorter song "That Home" in the trailer for 2011 film "Another Earth".

Columbia: The Tragic Loss: Columbia: The Tragic Loss is a 2004 documentary about the first Israeli astronaut, Ilan Ramon, who died when the Columbia spacecraft disintegrated upon reentry into the Earth's atmosphere.  Two months after the disaster, Ramon's diary was found at one of the crash sites and was reconstructed by the Israel Museum along with Israeli police.  Interviews with NASA officials and with Ilan's family offer both expert analysis of the flight and a personal look at the tragedy.

Another Earth (album): Another Earth is the second album by saxophonist Gary Bartz which was recorded in 1968 and released on the Milestone label.

Another Earth: Another Earth is a 2011 American independent science fiction-drama film directed by Mike Cahill.  It stars Brit Marling, William Mapother, and Robin Lord Taylor.  It premiered at the 27th Sundance Film Festival in January 2011, and was distributed by Fox Searchlight Pictures.

X-Ray of a Lie: X-Ray of a Lie (Spanish: Radiografía de una mentira ) is a 2004 documentary film examining another film, "The Revolution Will Not Be Televised" about the events of the 2002 Venezuelan coup d'état attempt.  The "X-Ray" documentary, directed by Wolfgang Schalk and written by Schalk and Thaelman Urguelles, accuses Kim Bartley and Donacha O'Briain of "omissions and distortion" in "The Revolution Will Not Be Televised".  It premiered on DVD in Venezuela in July 2004.

Robin Lord Taylor: Robin Lord Taylor (born June 4, 1978) is an American film and television actor and director, known for "Accepted" (2006), "Another Earth" (2011) and "Would You Rather" (2012).  He stars in the television drama series "Gotham" as Oswald Cobblepot.

Supporting paragraphs: Another Earth Brit Marling
Answer: Boxers and Ballerinas