Question: The Soul of a Butterfly is an autobiography of a professional boxer that was born in what year?

Context:
Jermall Charlo
Jermall Charlo (born May 19, 1990) is an American professional boxer who held the IBF light middleweight title from 2015 to 2017.
 His identical twin brother, Jermell Charlo, is also a professional boxer and is younger by one minute.
 Both brothers are graduates of Hastings High School.
 They began boxing when they started following their father, himself a former boxer, into the gym.
 In 2016, both brothers became world champions when Jermell won the WBC light middleweight title.
Jermell Charlo
Jermell De'Avante Charlo (born May 19, 1990) is an American professional boxer who has held the WBC super welterweight title since 2016.
 His identical twin brother, Jermall Charlo, is also a professional boxer and is older by one minute.
 Both brothers are graduates of Hastings High School in Alief, Houston,Texas.
 They began boxing when they started following their father, a former boxer, into the gym.
Robert Garcia (American boxer)
Roberto Garcia Cortez (born January 29, 1975), best known as Robert Garcia, is an American former professional boxer who competed from 1992 to 2001, and held the IBF junior lightweight title from 1998 to 1999.
 He has since worked as a boxing trainer, and was voted Trainer of the Year by "The Ring" magazine in 2011, and by the Boxing Writers Association of America in 2012.
 Garcia is the older brother of professional boxer Mikey Garcia, who himself is a former junior lightweight world champion.
Muhammad Ali
Muhammad Ali ( ; born Cassius Marcellus Clay Jr.; January 17, 1942 – June 3, 2016) was an American professional boxer and activist.
 He is widely regarded as one of the most significant and celebrated sports figures of the 20th century.
 From early in his career, Ali was known as an inspiring, controversial, and polarizing figure both inside and outside the ring.
Drian Francisco
Drian Francisco (born November 10, 1982 in Sablayan, Occidental Mindoro, Philippines), nicknamed Gintong Kamao (Golden Fist), is a Filipino professional boxer.
 Born in the province of Mindoro, Francisco currently resides in Agoncillo, Batangas.
 His younger brother Lloyd Francisco, like him, is also a professional boxer.
Marlon Reid
Marlon Reid (born 17 April 1982) is a British professional boxer who was born in Swindon and currently lives in Bath.
 After reaching the ABA final against George Groves as an amateur Reid made his debut as a professional boxer on 17 October 2008 against Gary Cooper and won on points.
Don Diego Poeder
Don Diego Rivelino Alfredo Poeder (born 3 April 1972) is a former Dutch professional boxer.
 He is known as the only Dutch professional boxer that won a world title as a professional undefeated.
The Soul of a Butterfly
The Soul of a Butterfly is the autobiography of Muhammad Ali, born Cassius Marcellus Clay Jr., a former heavyweight boxer who was a three time World Heavyweight Champion and is the greatest heavyweight of all time.
David Haye
David Deron Haye (born 13 October 1980) is a British professional boxer who has held world titles in two weight classes.
 He is the first British boxer to reach the final of the World Amateur Boxing Championships, where he won a silver medal in 2001.
 As a professional he became the first British boxer to become a unified cruiserweight world champion in 2008, winning three of the four major world titles, as well as the "Ring" magazine and lineal titles.
 In the same year he moved up to heavyweight, and became the WBA champion in 2009 after defeating Nikolai Valuev, who had a world record 9 in height and 99 lb weight advantage on Haye.
Steve Ward (boxer)
Steve Ward (born c. 1956) is a British professional boxer, notable for being the oldest professional boxer in the world.
 He was confirmed as such in 2011 at age 54.
 He lost the distinction in 2015, when an older fighter competed in a professional bout, but regained it later that year when he fought professionally at 59.
 His original boxing career lasted from 1977 to 1987.
 He made a comeback in 2010, and as of 2015 had no plans to retire.

Answer: 1942