Question: who wrote the screen play for the opening night film at the 2013 Deauville American Film Festival ?

Context paragraphs:
Behind the Candelabra: Behind the Candelabra is a 2013 American drama film directed by Steven Soderbergh.  It dramatizes the last ten years in the life of pianist Liberace and the relationship he had with Scott Thorson.  It is based on Thorson’s memoir, "" (1988).  Richard LaGravenese wrote the screenplay.  Jerry Weintraub was the executive producer.  It premiered at the 2013 Cannes Film Festival on May 21, 2013 and competed for the Palme d'Or.  It aired on HBO on May 26, 2013 and was given a cinematic release in the United Kingdom on June 7, 2013.  The film received general acclaim from television critics including praise for the performances of Michael Douglas and Matt Damon.

Night Moves (2013 film): Night Moves is a 2013 American drama film directed by Kelly Reichardt and written by Reichardt and Jonathan Raymond, starring Jesse Eisenberg, Dakota Fanning, Peter Sarsgaard, Alia Shawkat, and James LeGros.  The film follows three radical environmentalists who plot to blow up a dam.  It was shown in the main competition section of the 70th Venice International Film Festival, at the 2013 Toronto International Film Festival and at 2013 Deauville American Film Festival, where it won Grand Prix of the festival.

2014 Deauville American Film Festival: The 40th Deauville American Film Festival took place at Deauville, France from September 5 to 14, 2014.  Woody Allen's romantic comedy film "Magic in the Moonlight" served as the opening night film. ""  by Robert Rodriguez and Frank Miller was the closing night film of the festival.  The Grand Prix was awarded to "Whiplash" by Damien Chazelle, which also won the Audience award at the festival.

2012 Deauville American Film Festival: The 38th Deauville American Film Festival took place at Deauville, France from August 31 to September 9, 2012.  Jeff Nichols's drama film "Mud" served as the opening night film. " Savages" by Oliver Stone was the closing night film of the festival.  The Grand Prix was awarded to "Beasts of the Southern Wild" by Benh Zeitlin.

Deauville American Film Festival: The Deauville American Film Festival (French: Festival du cinéma américain de Deauville ) is a yearly film festival devoted to American cinema, taking place since 1975 in Deauville, France.

Stand Clear of the Closing Doors: Stand Clear of the Closing Doors is a 2013 drama directed by Sam Fleischner.  The story is about an autistic child named Ricky who, after a particularly difficult day at school, escapes into the subways.  It was shown in the main competition section of the 2013 Deauville American Film Festival, where it won Prix du Jury (Jury Special Prize) of the festival.

2013 Deauville American Film Festival: The 39th Deauville American Film Festival took place at Deauville, France from August 30 to September 8, 2013.  Steven Soderbergh's drama film "Behind the Candelabra" served as the opening night film. " Snowpiercer" by Bong Joon-ho was the closing night film of the festival.  The Grand Prix was awarded to "Night Moves" by Kelly Reichardt.

2015 Deauville American Film Festival: The 41st Deauville American Film Festival took place at Deauville, France from September 4 to 13, 2015.  Baltasar Kormákur's biographical disaster film "Everest" served as the opening night film. " Sicario" by Denis Villeneuve was the closing night film of the festival.  The Grand Prix was awarded to "99 Homes" by Ramin Bahrani.

Chasing Shakespeare: Chasing Shakespeare is a 2013 film directed by Norry Niven, and starring Danny Glover, Ashley Bell, and Graham Greene.  The premiered at the Dallas International Film Festival Festival in April 2013, and was opening night film at the Breckenridge Film Festival, The Montreal Black Film Festival, The 38th annual Native American Film Festival in San Francisco on November 1, 2013, The African Diaspora Film Festival NY and The Orlando Film Festival.  It has been nominated 36 times in as many festivals, winning 27 awards including Best Feature Film at The FirstGlance Film Festival, Best of Fest at The Big Island Film Festival, Best Feature Film at the AFI Cannes Film Festival, Audience Choice, Best Opening Title Sequence at SXSW, Best Dram/Romance at The WorldFest Houston Film Festival, Best Feature Film at the World Peace Initiative The Hampton's Film Festival and Best Director at Red Nations Film Festival and The Orlando Film Festival.  The film was written by James Bird.

2016 Deauville American Film Festival: The 42nd Deauville American Film Festival took place at Deauville, France from September 2 to 11, 2016.  American crime drama film "The Infiltrator" by Brad Furman was selected as the opening night film, while Black dramedy "War Dogs" by Todd Phillips served as the closing night film of the festival.  The Grand Prix was awarded to "Little Men" by Ira Sachs.

Supporting paragraphs: 2013 Deauville American Film Festival Behind the Candelabra
Answer: Richard LaGravenese