Question: Rocky Balboa is loosely based on this American former professional boxer who fought at heavyweight ans was born in what year
Context: Michael Gerard Tyson ( ; born June 30, 1966) is an American former professional boxer who competed from 1985 to 2005.  He reigned as the undisputed world heavyweight champion and holds the record as the youngest boxer to win a heavyweight title at 20 years, 4 months and 22 days old.  Tyson won his first 19 professional fights by knockout, 12 of them in the first round.  He won the WBC title in 1986 after stopping Trevor Berbick in two rounds, and added the WBA and IBF titles after defeating James Smith and Tony Tucker in 1987.  This made Tyson the first heavyweight boxer to simultaneously hold the WBA, WBC and IBF titles, and the only heavyweight to successively unify them. Monte Barrett (born May 26, 1971) is an American former professional boxer who competed from 1996 to 2014.  He challenged once for the WBA heavyweight title in 2006, and fought many top heavyweight champions and contenders during his career. Rocky is a 1976 American sports drama film directed by John G. Avildsen and both written by and starring Sylvester Stallone.  It tells the rags to riches American Dream story of Rocky Balboa, an uneducated but kind-hearted working class Italian-American boxer working as a debt collector for a loan shark in the slums of Philadelphia.  Rocky starts out as a small-time club fighter, and later gets a shot at the world heavyweight championship.  The film also stars Talia Shire as Adrian, Burt Young as Adrian's brother Paulie, Burgess Meredith as Rocky's trainer Mickey Goldmill, and Carl Weathers as the champion, Apollo Creed. Adonis "Donnie" Creed, formerly Adonis "Donnie" Johnson, is the main protagonist and title character from the "Rocky" spin-off and sequel "Creed".  Adonis is the illegitimate son of Apollo Creed; the result of an affair by the former heavyweight champion and a woman with the surname Johnson.  Adonis spends the first several years of his life in foster care and juvenile hall, until he is subsequently adopted by Mary Anne Creed, Apollo's widow.  He lives a life of luxury and maintains a stable white collar job, only to abandon it to pursue a lifelong dream of becoming a professional boxer.  He goes to Philadelphia and convinces his late father's friend Rocky Balboa to train and mentor him. James "Buster" Douglas (born April 7, 1960) is an American former professional boxer who competed from 1981 to 1990, and 1996 to 1999.  He is best known for his stunning upset of Mike Tyson on February 11, 1990 in Tokyo to win the undisputed heavyweight title.  At the time Tyson was undefeated and considered to be the best boxer in the world, as well as one of the most feared heavyweight champions in history due to his domination of the division over the previous three years.  The only casino to make odds for the fight (all others declining to do so as they considered the fight such a foregone conclusion) had Douglas as a 42-to-1 underdog for the fight, making his victory, in commentator Jim Lampley's words, "The biggest upset in the history of heavyweight championship fights."  Douglas held the title for eight months and two weeks, losing on October 25, 1990 to Evander Holyfield via third-round knockout, in his only title defense. Charles "Chuck" Wepner (born February 26, 1939) is an American former professional boxer who fought at heavyweight.  As a world ranked contender he fell just seconds short of a full fifteen rounds with world heavyweight champion Muhammad Ali in a 1975 title fight.  Wepner also scored notable wins over Randy Neumann and Ernie Terrell. Robert "Rocky" Balboa is the title character of the "Rocky" series.  The character was created by Sylvester Stallone, who also portrayed him in all seven "Rocky" films.  He is depicted as an everyman who started out by going the distance and overcoming obstacles that had occurred in his life and career as a professional boxer.  While he is loosely based on Chuck Wepner, a one-time boxer who fought Muhammad Ali and lost on a TKO in the 15th round, the inspiration for the name, iconography and fighting style came from boxing legend Rocky Marciano. Michael Sylvester "Sly" Gardenzio Stallone ( ; ] ; born July 6, 1946) is an American actor and filmmaker.  He is well known for his Hollywood action roles, including boxer Rocky Balboa, the title character of the "Rocky" series' seven films from 1976 to 2015; soldier John Rambo from the four "Rambo" films, released between 1982 and 2008; and Barney Ross in the three "The Expendables" films from 2010 to 2014.  He wrote or co-wrote most of the 14 films in all three franchises, and directed many of the films. Lawrence Marvin Clay-Bey (born December 14, 1965) is an American former professional boxer who fought at heavyweight.  As an amateur he was a two-time winner (1995 and 1996) of the United States National Championships as well as a bronze medalist at the 1995 World Championships, all in the super heavyweight division. Andre Michael Ward (born February 23, 1984) is an American former professional boxer who competed from 2004 to 2017.  He retired with an undefeated record and held eight world titles in two weight classes, including the unified WBA (Super), WBC, "Ring" magazine, and lineal super middleweight titles between 2009 and 2015; and the unified WBA (Undisputed), IBF, WBO, and "Ring" light heavyweight titles between 2016 and 2017.  During his reign as light heavyweight champion, Ward was ranked as the world's best active boxer, pound for pound, by "The Ring" magazine and the Transnational Boxing Rankings Board (TBRB), as well as the world's best active boxer in the division by "The Ring", the TBRB, and BoxRec.
Answer: 1939