Question: Luca Guadagnino is a film director who directed the film written by whom?

Context paragraphs:
Suspiria (upcoming film): Suspiria is an upcoming horror film directed by Luca Guadagnino and written by David Kajganich.  It is an adaptation of the 1977 film "Suspiria", and stars Dakota Johnson, Chloë Grace Moretz, Mia Goth, and Tilda Swinton.  Jessica Harper, lead star of the original film, will also appear as a different character.

Exit: una storia personale: Exit: una storia personale ("Exit: a personal history"), is a 2010 Italian indie drama film written and directed by Massimiliano Amato and starring Luca Guastini, Nicola Garofalo, Marcella Braga, Paolo Di Gialluca and Antonio Calamonici.  The film depicts an intimate portrait of a man suffering from mental anguish and his relationship with his brother.

I Am Love (film): I Am Love (Italian: Io sono l'amore ) is a 2009 Italian film directed by Luca Guadagnino set around 2000 in Milan.  The film follows an "haute bourgeoisie" family through changing times and fortunes, and its disruption by the forces of passion.  The cast is led by Tilda Swinton as Emma Recchi.  Producers Swinton and Guadagnino developed the film together over an 11-year period.

Zombie Massacre (film): Zombie Massacre (UK DVD title: Apocalypse Z) is a 2013 Italian-German-Canadian-American zombie horror film written and directed by Luca Boni and Marco Ristori.  Uwe Boll served as producer and acted within the film in the role of President of the United States.  The film stars Christian Boeving, Mike Mitchell, and Tara Cardinal, and is an adaptation of the Wii video game of the same name, developed by 1988 Games.  The film had its UK DVD release on July 1, 2013.

Luca Guadagnino: Luca Guadagnino (born 1971) is an Italian film director.  He first won recognition with the 2005 film "Melissa P.".  He has collaborated several times with Tilda Swinton, including the films "The Protagonists" (1999), "I Am Love" (2010), "A Bigger Splash" (2015) and the upcoming "Suspiria" (2017).

A Neapolitan Spell: A Neapolitan Spell (Italian: Incantesimo napoletano ) is a 2002 Italian comedy film written and directed by Paolo Genovese and Luca Miniero, at their feature film debut.

Melissa P. (film): Melissa P. is a 2005 erotic drama film, directed by Luca Guadagnino, from a screenplay by Guadagnino, Barbara Alberti and Cristiana Farina.  it is based upon "100 colpi di spazzola prima di andare a dormire" a semi-autobiographical novel by Melissa Panarello.  It stars María Valverde, Fabrizia Sacchi, Primo Reggiani, Nilo Mur, Elio Germano, Letizia Champa, Davide Pasti, Alba Rohrwacher, Piergiorgio Bellocchio, Giulio Berruti, Marcello Mazarrella, Claudio Santamaria and Geraldine Chaplin.

A Bigger Splash (film): A Bigger Splash is a 2015 English-language Italian-French psychological thriller drama film directed by Luca Guadagnino and written by Alain Page and David Kajganich, based on the film "La Piscine".  The film stars Tilda Swinton, Matthias Schoenaerts, Ralph Fiennes and Dakota Johnson.  The film was named after David Hockney's 1967 painting of the same title.  It competed for the Golden Lion at the 72nd Venice International Film Festival.

Call Me by Your Name (film): Call Me by Your Name is an internationally co-produced coming-of-age drama film directed by Luca Guadagnino and written by James Ivory.  It is based on the novel of the same name by André Aciman.  It stars Timothée Chalamet, Armie Hammer, Michael Stuhlbarg, Amira Casar, Esther Garrel, and Victoire Du Bois.

The Protagonists (1999 film): The Protagonists is a 1999 crime thriller film written and directed by Luca Guadagnino in his directorial debut.  It stars Tilda Swinton and Fabrizia Sacchi.

Supporting paragraphs: Luca Guadagnino A Bigger Splash (film)
Answer: Alain Page and David Kajganich