Question: Deniz Gamze Ergüven's debut film depicts the lives of how many sisters?

Context articles: The Poker House
Samson and Delilah (2009 film)
Prasanna (film)
The Harvest (2010 film)
Ghalti
Deniz Gamze Ergüven
Kings (2017 film)
The Battle of the Somme (film)
Mustang (film)
Pride &amp; Prejudice (2005 film)

The Poker House, subsequently retitled as Behind Closed Doors, is a 2008 American drama film written and directed by Lori Petty, in her directorial debut.
 The film depicts a painful day in the life of a teenaged girl who is raising her two younger sisters in their mother's whorehouse.
 The story is based on Petty's own early life during the mid-1970s.
Samson and Delilah is a 2009 Australian film directed by Warwick Thornton and starring Rowan McNamara and Marissa Gibson, both young first time actors.
 It was filmed in and around Alice Springs.
 Described as a "survival love story" by the director, the film depicts two indigenous Australian 14-year-olds living in a remote Aboriginal community who steal a car and escape their difficult lives by going to Alice Springs.
 The film competed in the Un Certain Regard section at the 2009 Cannes Film Festival, winning the Caméra d'Or ('Gold Camera Award' for best first feature film) at the 2009 Cannes Film Festival.
 Screen Australia announced on 29 September 2009 that the film had been nominated as Australia's official entry in the Academy Awards best foreign language film category.
Prasanna is a 1950 Indian Malayalam film, directed by S. M. Sriramulu Naidu and produced by Pakshiraja Studios.
 The film stars Pappukutty Bhagavathar, Kottarakkara Sreedharan Nair and P. A. Thomas in lead roles.
 The film had musical score by M. S. Gnanamani.
 It is debut Malayalam film of Travancore Sisters, Lalitha, Padmini and Ragini.
 Also the debut film of actors Kandiyoor Parameshwarankutty, P. A. Thomas, Pappukkutty Bhagavathar, debut Malayalam film of Sreeramulu Naidu, playback singers M. L. Vasantha Kumari, P. A. Periyanayiki and Radha-Jayalakshmi.
The Harvest (Spanish: "La Cosecha" ) is a 2010 documentary film about agricultural child labor in America.
 The film depicts children as young as 12 years of age who work as many as 12 hours a day, six months a year, subject to hazardous conditions: heat exposure, pesticides, and dangerous work.
 The agriculture industry has been subject to significantly more lenient labor laws than any other occupation in the United States.
 As a result, lack of consistent schooling significantly limits their opportunities of succeeding in high school or more.
 The hazardous conditions threaten their health and lives.
 The purpose of the documentary is to bring awareness of the harsh working conditions which tens of thousands of children face in the fields of the United States each year and to enact the Children's Act for Responsible Employment (CARE Act, HR 3564) which will bring parity of labor conditions to field workers that are afforded to minors in other occupations.
Ghalti (Tv serial) is a Pakistani television romantic and social Islamic issue drama serial that aired on A-Plus TV from July 14, 2016 to October 7, 2016.
 It was directed by Kaleem Rajput and written by Iftikhar Ahmed Usmani.
 It is a story of two sisters who do not live together and are even unaware of the fact that they are sisters.
 One of them lives with their parents and the other has been adopted by her aunt.
 As they grow up, their cousin enters the scene.
 While the family wants to marry him with the one who lives her parents, he loves the other sister.
 He marries them both without telling anyone unaware that they are real sisters.
 Many people are still not aware of limitations in our religion that two sisters can be married the same man at the same time.
 How certain mistakes in life can outturn the whole scenario.
 Ghalti has an ensemble cast with Agha Ali as Saim, Sania Shamshad as Zara Sidra Batool as Saman in leading roles, with the supporting cast Abid Ali as Ikhlaque Ahmed, Sajida Syed, Shehryar Zaidi, Lubna Aslam, and Naila Jaffery, The show is set in Karachi, Sindh.
 It remained popular throughout its run.
Deniz Gamze Ergüven (born 4 June 1978) is a Turkish-French film director best known for her debut film "Mustang".
Kings is a 2017 English-language romance film written and directed by Deniz Gamze Ergüven, set to be released in 2017.
 The film stars Halle Berry and Daniel Craig.
The Battle of the Somme (US title, "Kitchener's Great Army in the Battle of the Somme"), is a 1916 British documentary and propaganda war film, shot by two official cinematographers, Geoffrey Malins and John McDowell.
 The film depicts the British Army in the preliminaries and early days of the Battle of the Somme (1 July – 18 November 1916).
 The film had its première in London on 10 August 1916 and was released generally on 21 August.
 The film depicts trench warfare, marching infantry, artillery firing on German positions, British troops waiting to attack on 1 July, treatment of wounded British and German soldiers, British and German dead and captured German equipment and positions.
 A scene during which British troops crouch in a ditch then "go over the top" was staged for the camera behind the lines.
Mustang is a 2015 internationally co-produced drama film directed by Turkish-French film director Deniz Gamze Ergüven.
 The film is set in a remote Turkish village and depicts the lives of five young orphaned sisters and challenges they face growing up as girls in a conservative society.
 The event that triggers the family backlash against the five sisters at the beginning of the film is based on Ergüven's personal life.
Pride & Prejudice is a 2005 British-American romantic drama  directed by Joe Wright and based on Jane Austen's 1813 novel of the same name.
 The film depicts five sisters from an English family of landed gentry as they deal with issues of marriage, morality and misconceptions.
 Keira Knightley stars in the lead role of Elizabeth Bennet, while Matthew Macfadyen plays her romantic interest Mr Darcy.
 Produced by Working Title Films in association with StudioCanal, the film was released on 16 September 2005 in the United Kingdom and Ireland and on 11 November in the United States.