Question: Which film was nominated for an Academy Award for Best Documentary Feature, Alaska Wilderness Lake or Umbrella?

Context paragraphs:
Deborah Hoffmann: Deborah Hoffmann is an American documentary director and editor.  She edited and along with Frances Reid co-directed "Long Night's Journey into Day" (2000), which won the 2000 Sundance Film Festival Grand Jury award for best documentary and was nominated for the Academy Award for Best Documentary Feature.  She also directed the Academy Award-nominated short film, "Complaints of a Dutiful Daughter" (1995) and was the editor of "The Times of Harvey Milk", which won the 1984 Oscar for best documentary.

Gasland: Gasland is a 2010 American documentary written and directed by Josh Fox.  Nominated for an Academy Award for Best Documentary in 2011, the film focuses on communities in the United States affected by natural gas drilling and, specifically, a method of horizontal drilling into shale formations known as hydraulic fracturing.  The film was a key mobilizer for the anti-fracking movement, and "brought the term 'hydraulic fracturing' into the nation's living rooms" according to "The New York Times".  The film was nominated for the Academy Award for Best Documentary Feature.

Alaska Wilderness Lake: Alaska Wilderness Lake is a 1971 American documentary film produced by Alan Landsburg.  It was nominated for an Academy Award for Best Documentary Feature.

Kirk Simon: Kirk Simon is an American filmmaker.  He is best known for his work on various documentaries.  Simon has been nominated for an Academy Award four times, winning once.  Simon has produced three films nominated for the Best Documentary (Short Subject), including "" (1990), "Rehearsing a Dream" (2007), and "Strangers No More" (2010); he won the award for the latter film at the 83rd Academy Awards, and shared the win with Karen Goodman with whom he worked on all three films.  Simon has also received a nomination in the category of the Best Documentary Feature for producing "" (1986).  In 2016, he produced a feature documentary on the centenary of the Pulitzer prize called "The Pulitzer at 100."

Fisher Stevens: Fisher Stevens (born Steven Fisher; November 27, 1963) is an American actor, director, producer and writer.  As an actor, he is best known for his portrayals of Ben Jabituya in "Short Circuit" (renamed "Ben Jahrvi" in the sequel), Chuck Fishman on the 1990s television series "Early Edition" and villainous computer genius Eugene "The Plague" Belford in "Hackers".  His most recent successes include the 2010 Academy Award for Best Documentary Feature for his film "The Cove" and the 2008 Independent Spirit Award for Best Documentary Feature for his film "Crazy Love".  In addition, he has directed the Leonardo DiCaprio-produced documentary "Before the Flood", which is executive produced by Martin Scorsese, has screened at the Toronto International Film Festival, and will be screened by National Geographic.

Ava DuVernay: Ava Marie DuVernay ( ; born August 24, 1972) is an American director, screenwriter, film marketer, and film distributor.  At the 2012 Sundance Film Festival, DuVernay won the Best Director Prize for her second feature film "Middle of Nowhere", becoming the first African-American woman to win the award.  For her work in "Selma" (2014), DuVernay was the first black female director to be nominated for a Golden Globe Award.  With "Selma", she was also the first black female director to have her film nominated for the Academy Award for Best Picture.  In 2017, she was nominated for the Academy Award for Best Documentary Feature for her film "13th" (2016).

Sean Fine: Sean Fine is an American documentary film-maker whose "War/Dance" about child soldiers was nominated for an Academy Award for Best Documentary Feature in 2007. " Inocente", made by Fine and his wife, won the 2013 Academy Award for Best Documentary (Short Subject).  The film tells the story of a 15-year-old homeless girl from California who has ambitions to become an artist.

Andrea Nix Fine: Andrea Nix Fine is an American documentary filmmaker.  Along with her husband, Sean Fine, she won the Academy Award for Best Documentary (Short Subject) for directing "Inocente" (2013), about a homeless thirteen-year-old girl who is also an artist.  They were also nominated for the Academy Award for Best Documentary Feature in 2007 for "War/Dance" and directed the 2013 HBO documentary "Life According to Sam".  She is a 1991 graduate of Colby College.

Umbrella (film): Umbrella or "San" is a Chinese documentary film directed by Du Haibin and released in 2007.  The film documents the experiences of modern rural China, particularly five social groups: students, soldiers, tradespeople, and peasants.  Du's stated goal with the film was to highlight the growing disparity between China's prosperous cities and its stagnating countryside.

The Face of a Genius: The Face of a Genius is a 1966 American documentary film about Eugene O’Neill, produced by Alfred R. Kelman for WBZ-TV Boston.  It was nominated for an Academy Award for Best Documentary Feature, the first time that a film originally produced for television was recognized by the Academy as a nominee for Best Documentary Feature.

Supporting paragraphs: Alaska Wilderness Lake Umbrella (film)
Answer: Alaska Wilderness Lake