Title: John Pierson (filmmaker)
Content:  John Pierson (born April 10, 1954) is an American independent filmmaker. He is best known for helping to produce the first works by filmmakers Spike Lee, Richard Linklater, Michael Moore, and Kevin Smith, which he wrote about in his 1995 book Spike, Mike, Slackers, & Dykes (reissued in 2004 as Spike, Mike Reloaded).
Title: Piotr Kosiba
Content:  The director Andrej Baranski oversaw production of a Polish film based on Kosiba's life in 2007 entitled Braciszek.
Title: Frank Pierson
Content:  Frank Romer Pierson (May 12, 1925 – July 22, 2012) was an American screenwriter and film director.
Title: Frank Pierson
Content:  Ballou and Cool Hand Luke, which were both nominated for Academy Awards. He wrote Dog Day Afternoon, which won Pierson the Academy Award. He directed and contributed to the screenplay of the 1976 remake of A Star Is Born; and the in-fighting between himself, Barbra Streisand, Kris Kristofferson and producer (and at the time boyfriend of Streisand) Jon Peters on the film led him to write the article "My Battles with Barbra and Jon" for The Village Voice. Pierson directed several films produced for television, including Dirty Pictures, Citizen Cohn, Conspiracy, and Somebody Has to Shoot the Picture. His direction on Conspiracy won a Directors' Guild Award for Best Television Movie, and his second Peabody and BAFTA Award. He 
Title: Piccadilly Jim (2004 film)
Content:  Kirk D'Amico, Marion Pilowsky, and Steve Christian were executive producers. Peter Czernin, Graham Broadbent, and Andrew Hauptman were producers. The director was John McKay and the screenwriter was Julian Fellowes.
Title: Pig (1998 film)
Content:  Pig is a 1998 experimental, psychological horror, short film directed by American underground film maker Nico B. and co-directed by deathrock pioneer Rozz Williams. The film stars Rozz Williams and James Hollan and was produced by Nico B. It was distributed by the CAV Distributing company in South San Francisco and produced by the studios Open Eye Productions and Cult Epics. (The latter of which Nico B. is the founder and owner.)
Title: Pier Francesco Pingitore
Content:  Pier Francesco Pingitore (born 27 September 1934) is an Italian director, screenwriter, playwright and author.
Title: Oren Peli
Content:  Peli began as a computer software programmer, and was one of the developers behind Photon Paint, a bitmap graphics program for the Amiga. His first film Paranormal Activity was inspired by Peli moving into his first house alone and without family nearby. Peli heard creaks and knocks in the night, which laid the groundwork for a film about a family running around with cameras trying to catch what was going on in the house. After the success of Paranormal Activity, Peli worked with James Wan and Leigh Whannell to develop Insidious. Peli also produced and wrote the 2012 horror film Chernobyl Diaries, based on the Chernobyl disaster and on his story The Diary of Lawson Oxford. The film followed "a group of friends who, while vacationing in Europe, find themselves stranded in the abandoned city of Prypiat, Ukraine only to discover that they are not alone."
Title: Pigeon (film)
Content:  Pigeon is a short film by Canadian director Anthony Green. It was produced by Emmy and Gemini nominated Canadian producer Karen Wookey. Jay Firestone was executive producer of the film.
Title: Dead Pigs
Content:  The film was written and directed by Cathy Yan. It was inspired by the 2013 Huangpu River dead pigs incident. Yan said, "I was born close to Shanghai, and I used to be a reporter, so it just felt like the story I had to tell." The film was shot by Federico Cesca. Filming took place in Shanghai.

Question: Who was the director of Pi?
Answer: Darren Aronofsky.