Question: Who founded the Sundance Film Festival and also appeared in the 2001 film Spy Game?

Context paragraphs:
Giona Ostinelli: Giona Ostinelli (born March 12, 1986) is a Swiss–Italian composer who resides and works in Los Angeles.  He has written scores for over 30 feature films that premiered at Sundance Film Festival, Tribeca Film Festival, Cannes International Film Festival, South by Southwest Film Festival, Fantastic Fest, FrightFest, Cincinnati Film Festival, Hamptons International Film Festival, Palm Springs International Film Festival, Fort Lauderdale International Film Festival, Chicago International Children's Film Festival, among others.  Ostinelli's score for breakout psychological thriller "Darling" released by Lakeshore Records and fan favorite Mondo Records has been described as "one of the most interesting and innovative soundscapes...".  His soundtrack for "POD" has been shortlisted for the Academy Awards for Best Original Score.

Sundance Film Festival: The Sundance Film Festival, a program of the Sundance Institute, is a film festival that takes place annually in Park City, Utah.  With over 46,660 attendees in 2016, it is the largest independent film festival in the United States.  Held in January in Park City and Salt Lake City, Utah, as well as at the Sundance Resort, the festival is a showcase for new work from American and international independent filmmakers.  The festival comprises competitive sections for American and international dramatic and documentary films, both feature films and short films, and a group of out-of-competition sections, including NEXT, New Frontier, Spotlight, Midnight, Premieres and Documentary Premieres.  The 2017 Sundance Film Festival took place from January 19 to January 29, 2017.

Spy Game: Spy Game is a 2001 American spy film directed by Tony Scott and starring Robert Redford and Brad Pitt.  The film grossed $62 million in the United States and $143 million worldwide and received mostly positive reviews from film critics.

Sarah Price (filmmaker): Sarah Price is an American filmmaker, known for the feature documentaries "American Movie" (1999 Winner of the Grand Jury Prize for Documentary at the Sundance Film Festival, released by Sony Pictures Classics), "Caesar's Park" (2001 SXSW Int'l Film Fest, Sundance Channel), "The Yes Men" (2003 Toronto Int'l Film Festival, released by United Artist/MGM), and "Summercamp! " (2006 Toronto Int'l Film Fest, Sundance Channel).  Price was also a cinematographer on "The Yes Men Fix the World" (2009 Sundance Film Fest/HBO), and a Co-Producer of "Youssou N’dour: I Bring What I Love" (2008 Toronto Int’l Fest).  In 2009, she expanded into commercial directing and is represented by Independent Media Inc.  In 2014, she further expanded into episodic television, directing "The Carrie Diaries" for Warner Brothers.

Heidi Ewing: Heidi Ewing is a director, producer, and writer of documentary films.  She and Rachel Grady founded Loki Films in 2001, and have collaborated on several documentaries together.  She is best known as the co-director of "Jesus Camp", which was nominated for an Academy Award for best documentary in 2006.  Next came"12th & Delaware" (HBO), which premiered at the 2010 Sundance Film Festival.  The film "casts a heart-rending light on the abortion divide" (LA Times) and was honored with a Peabody Award.  "Detropia", a poetic look at Ewing's home town, also won several awards, including Best Editing at Sundance 2012, Outstanding Direction and Outstanding Original Score, at the 2013 Cinema Eye Honors for Nonfiction Filmmaking and a News and Documentary Emmy for editing.  "Norman Lear: Just Another Version of You" was the opening night selection of the 2016 Sundance Film Festival and premiered on PBS American Masters on October 25, 2016.  Other films as a director include "The Boys of Baraka", "Freakonomics", and "The Education of Mohammed Hussein".

Jennifer Phang: Jennifer Phang is a filmmaker most known for her feature films "Advantageous" (2015), which premiered at the 2015 Sundance Film Festival and won a Special Jury Award for Collaborative Vision there and was also based on her award-winning short film of the same name, and "Half-Life" (2008), which also premiered at the 2008 Sundance Film Festival and won "Best Film" awards at a number of film festivals including the Gen Art Film Festival, the San Francisco International Asian American Film Festival (now known as CAAMFest) as well an "Emerging Director Award" at the Asian American International Film Festival.

Jordan Vogt-Roberts: Jordan Charles Vogt-Roberts (born September 22, 1984) is an American film and television director and screenwriter.  His feature directorial debut, "The Kings of Summer", screened at the 2013 Sundance Film Festival, where it was nominated for the Grand Jury Prize, and also at the 2013 Cleveland International Film Festival.  The film won the Narrative Feature Audience Award at the 2013 Dallas International Film Festival.  He also wrote and directed a short film which screened at the Sundance Film Festival and SXSW, "Successful Alcoholics".  He also co-wrote and directed the TV series "Mash Up".  In 2017, Vogt-Roberts directed the MonsterVerse film "".

2006 Sundance Film Festival: The 2006 Sundance Film Festival was held from 19 January to 29 January 2006.  It was held in Park City, Utah with screenings in Salt Lake City, Utah; Ogden, Utah; and the Sundance Resort.  It was the 22nd iteration of the Sundance Film Festival, and the celebration of the 25th anniversary of the Sundance Institute.  The opening night film was "Friends with Money"; the closing night film was "Alpha Dog".

Ry Russo-Young: Ry Russo-Young (born November 16, 1981) is an American independent filmmaker.  Her films "Nobody Walks" and "You Won't Miss Me" appeared at the Sundance Film Festival.  "Nobody Walks" won a special jury prize at Sundance, and was released by Magnolia Pictures in 2014, and "You Won't Miss Me" won a Gotham Award for Best Film Not Playing at a Theater Near You.  Her first feature, "Orphans", won a special jury prize at South by Southwest in 2007.  Her short film "Marion", won several awards including a Silver Hugo for Best Experimental Short at the Chicago Independent Film Festival.  She also appeared in Joe Swanberg's "Hannah Takes the Stairs" and "The Color Wheel."

Robert Redford: Charles Robert Redford Jr. (born August 18, 1936) is an American actor, director, producer, businessman, environmentalist, and philanthropist.  He is the founder of the Sundance Film Festival.

Supporting paragraphs: Spy Game Robert Redford
Answer: Robert Redford