Question: What year did the film, in which Amy Seimetz co-wrote and co-directed, appear in the Sundance Film Festival?

Context articles: Pit Stop (2013 film)
Sundance Film Festival
Rob Nilsson
The Girlfriend Experience
A Horrible Way to Die
Silver Bullets
Lovesong
Amy Seimetz
My Days of Mercy
Sun Don't Shine

Pit Stop is an American drama film, which premiered at the 2013 Sundance Film Festival.
 Directed by Yen Tan and written by Tan and David Lowery, the film stars Bill Heck and Marcus DeAnda as Gabe and Ernesto, two gay men in a small town in Texas, who begin to build a relationship via their interactions at the local gas station.
 The film also stars Amy Seimetz as Gabe's ex-wife Shannon and Alfredo Maduro as Ernesto's former partner Luis, both of whom are still involved in their ex-partners' lives.
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.
Rob Nilsson is a filmmaker, poet, and painter, best known for his feature film "Northern Lights", co-directed with John Hanson and winner of the Camera d’Or at the Cannes Film Festival (1979).
 He also is known for directing and playing the lead role in "Heat and Sunlight", produced by Steve and Hildy Burns, also featuring Consuelo Faust, Don Bajema and Ernie Fosseliius.
 "Heat and Sunlight" won the Grand Jury Prize Dramatic at the Sundance Film Festival in 1988, and his 9 @ Night Film Cycle won the 2008 San Francisco Film Critics Circle Marlon Riggs Award for Courage and Vision in Cinema.
 Nilsson has also received Lifetime Achievement awards from the Fargo International Film Festival, the St. Louis International Film Festival, the Kansas City Filmmaker’s Jubilee, the Master's Award from the Golden Apricot Film Festival, a Filmmaker of the Year Award from the Silver Lake Film Festival, and the Milley Award from the city of Mill Valley for accomplishment in the Arts.
The Girlfriend Experience is a 2009 American experimental drama film directed by Steven Soderbergh and starring then-active adult film actress Sasha Grey.
 It was shot in New York City, and a rough cut was screened at the Sundance Film Festival in January 2009.
 The film has also been made available on Amazon Video on Demand as a pre-theatrical rental.
A Horrible Way to Die is a 2010 American horror film written by Simon Barrett, directed by Adam Wingard, and produced by Travis Stevens, Simon Barrett, and Kim Sherman.
 The film follows the journey of an escaped serial killer as he chases down his ex-girlfriend.
 It had its world premiere at the 2010 Toronto International Film Festival Vanguard program where it was picked up for distribution by Anchor Bay Entertainment.
 It also played at Fantastic Fest where it received three major awards: Best Screenplay for Simon Barrett, Best Actor for AJ Bowen and Best Actress for Amy Seimetz.
Silver Bullets is a 2011 American film written and directed and stars Joe Swanberg.
 The film stars Kate Lyn Sheil, Ti West, Amy Seimetz.
 The film had its world premiere at the Berlin Film Festival on February 12, 2011.
 and was then released in a limited release on October 28, 2011, by Factory25.
Lovesong is a 2016 American drama film directed by So Yong Kim, who co-wrote the film with Bradley Rust Gray.
 It stars Jena Malone, Riley Keough, Brooklyn Decker, Amy Seimetz, Marshall Chapman, Ryan Eggold, and Rosanna Arquette.
Amy Lynne Seimetz (born November 25, 1981) is an American actress, writer, producer, director, and editor.
 She has appeared in several productions, including AMC's "The Killing", HBO's "Family Tree" and Shane Carruth's critically acclaimed "Upstream Color".
 In 2015, she co-wrote, co-directed and executive produced the Starz series "The Girlfriend Experience", based on the Steven Soderbergh film of the same name, which was released to positive reviews and critical acclaim.
My Days of Mercy is an upcoming American-British drama-romance film directed by Tali Shalom Ezer, from a screenplay by Joe Barton.
 It stars Kate Mara, Ellen Page, Amy Seimetz, Brian Geraghty, and Elias Koteas.
 It was screened in the Gala Presentations section at the 2017 Toronto International Film Festival.
Sun Don't Shine is a 2012 independent thriller film written and directed by Amy Seimetz.
 It stars Kate Lyn Sheil and Kentucker Audley.
 It first premiered on March 10, 2012 at the South by Southwest Film Festival, where it won a special jury award.
 The film was released in a limited release and through video on demand on April 26, 2013, by Factory25.