Question: Who directed the Al Pacino movie inspired by the real life story of bank robber John Wojtowicz?

Context paragraphs:
John Wojtowicz: John Stanley Wojtowicz (March 9, 1945January 2, 2006) was an American bank robber whose story inspired the 1975 film "Dog Day Afternoon".

McVicar (album): McVicar is the soundtrack to the film "McVicar" and the fourth solo studio album by Roger Daltrey, the lead vocalist for The Who.  The film, a biopic of the English bank robber John McVicar, was produced by Daltrey and also featured him in the starring role as John McVicar himself.  Because all of the then-members of The Who played on the album, it is often considered to be an unrecognized Who album although there was no participation by the band in the songwriting.

Dillinger (1973 film): Dillinger is a 1973 American gangster film about the life and criminal exploits of notorious bank robber John Dillinger.  It stars Warren Oates as Dillinger, Ben Johnson as his pursuer, FBI Agent Melvin Purvis, and Cloris Leachman as the "Lady in Red" who made it possible for Purvis to kill Dillinger.  It also features the first film performance by the singer Michelle Phillips as Dillinger's moll Billie Frechette.  The film, narrated by Purvis, chronicles the last few years of Dillinger's life (depicted as a matter of months) as the FBI and law enforcement closed in.  The setting is Depression era America, from 1933 to 1934, with largely unromanticized depictions of the principal characters.  It was written and directed by John Milius for Samuel Z. Arkoff's American International Pictures.

Salvatore Naturale: Salvatore Antonio "Sal" Naturale, also known as Donald Matterson (c. 1953/1954– August 23, 1972) was an American bank robber whose attempted robbery of a Chase Manhattan bank branch in Brooklyn, along with John Wojtowicz, in August 1972, inspired the 1975 film "Dog Day Afternoon."  In the film he is portrayed by actor John Cazale.

Dog Day Afternoon: Dog Day Afternoon is a 1975 American crime drama film directed by Sidney Lumet, written by Frank Pierson, and produced by Martin Bregman and Martin Elfand.  The film stars Al Pacino, John Cazale, Charles Durning, Chris Sarandon, Penelope Allen, James Broderick, Lance Henriksen, and Carol Kane.  The title refers to the sultry "dog days" of summer.

The Dog (2013 film): The Dog (also known as "Storyville: The Great Sex Addict Heist") is a 2013 documentary film co-written and co-directed by Allison Berg and Frank Keraudren, about the real life story of bisexual bank robber John Wojtowicz that inspired the 1975 Al Pacino movie Dog Day Afternoon about his August 1972 attempted heist and 14-hour televised hostage situation in Brooklyn to pay for his lover's sex-reassignment surgery.

Biograph Theater: The Biograph Theater, at 2433 North Lincoln Avenue, near Lincoln Park in Chicago, Illinois, was originally a movie theater but now presents live productions.  It is notable as the location where bank robber John Dillinger was shot by FBI agents after watching a gangster movie on July 22, 1934.  The theater is on the National Register of Historic Places and was designated a Chicago Landmark on March 28, 2001.

Public Enemies (2009 film): Public Enemies is a 2009 American biographical mob drama film directed by Michael Mann and written by Mann, Ronan Bennett and Ann Biderman.  It is an adaptation of Bryan Burrough's non-fiction book "Public Enemies: America's Greatest Crime Wave and the Birth of the FBI, 1933–34".  Set during the Great Depression, the film chronicles the final years of the notorious bank robber John Dillinger (Johnny Depp) as he is pursued by FBI agent Melvin Purvis (Christian Bale), Dillinger's relationship with Billie Frechette (Marion Cotillard), as well as Purvis' pursuit of Dillinger's associates and fellow criminals Homer Van Meter (Stephen Dorff) and Baby Face Nelson (Stephen Graham).

I Stole a Million: I Stole a Million is a 1939 film noir crime film starring George Raft as a cab driver turned small-time crook who makes a big score and lives to regret it.  The supporting cast includes Claire Trevor, Dick Foran, and Victor Jory.  The movie was written by Nathanael West based on a story idea by Lester Cole, which in turn was based on the life story of bank robber Roy Gardner.  It was directed by Frank Tuttle, and released by Universal Pictures.

Robert G. Gillespie: Robert G. Gillespie (1903 – January 31, 1983) was an FBI agent who participated in the capture of bank robber John Dillinger, and who later became a justice of the Mississippi Supreme Court.

Supporting paragraphs: The Dog (2013 film) Dog Day Afternoon
Answer: Sidney Lumet