Question: When did Cassius Marcellus Clay fight against Elmo Henderson?

full_context: Document 1: Leon Spinks: Leon Spinks (born July 11, 1953) is an American former professional boxer who competed from 1977 to 1995. In only his eighth professional fight, he won the undisputed heavyweight championship in 1978 after defeating Muhammad Ali via split decision, in what was considered one of the biggest upsets in boxing history. Spinks was later stripped of the WBC title for facing Ali in an unapproved rematch seven months later, which he lost by unanimous decision.
Document 2: Muhammad Ali vs. Antonio Inoki: The fight between American boxer Muhammad Ali and Japanese professional wrestler Antonio Inoki was held at the Nippon Budokan arena in Tokyo on June 26, 1976. At the time, Ali had come off a knockout victory over Richard Dunn in May and was the reigning WBC/WBA Heavyweight Champion. Inoki, who had been taught the art of catch wrestling by legendary wrestler Karl Gotch, was staging exhibition fights against champions of various martial arts, in an attempt to show that pro wrestling was the dominant fighting discipline.
Document 3: Cassius Clay vs. Donnie Fleeman: Cassius Clay (soon Muhammad Ali) fought an eight-round boxing match with Texan Donnie Fleeman in Miami on February 21, 1961. Prior to this fight, Fleeman had a record of 51 fights with 45 wins including 20 knockouts. Clay won the bout through a technical knockout after the referee stopped the fight in the seventh round. This was the first time Clay had gone over six rounds in a boxing match. It was also the first time Fleeman had ever been knocked down in a boxing match. Fleeman retired from boxing after this fight.
Document 4: Chuck Wepner: 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.
Document 5: Elmo Henderson: Elmo Henderson born April 8, 1935 is an African-American former boxer from Texas. Despite his dubious claim of a 1972 win against Muhammad Ali in an exhibition match in San Antonio, Texas, he did not become particularly well known in the boxing community; John Spong of the "Texas Monthly" said that the match was the "shot not heard round the world". However, people who attended the exhibition say Elmo Henderson did not defeat Ali, and newspaper reports after the exhibition made no mention of Ali losing. After the match, Henderson became a part of George Foreman's Rumble in the Jungle event in Zaire and won a libel suit against Norman Mailer and "Playboy". As of 2003, Henderson was a homeless man in Austin, Texas. As of 2015, Henderson lives in a care home in Northern California.
Document 6: Rahman Ali: Rahman Ali (born Rudolph Valentino Clay ; July 18, 1943) is an American former heavyweight boxer. He is the younger brother of the late Muhammad Ali.
Document 7: Cassius Clay vs. Sonny Banks: Cassius Clay (soon Muhammad Ali) fought Sonny Banks in a ten-round boxing match at Madison Square Garden in New York City on February 10, 1962. Clay won the fight through a technical knockout when the referee stopped the fight in the fourth round. The event is remembered for being the first professional boxing match in which Ali was officially knocked down in the ring by his boxing opponent.
Document 8: Muhammad Ali vs. Chuck Wepner: Muhammad Ali and Chuck Wepner fought each other in a boxing match on March 24, 1975. This was Ali's first boxing bout after The Rumble in the Jungle. The fight was billed as "Give the White Guy a Break". Ali won the fight after he knocked out Wepner in the fifteenth round.The fight is notable for being among the four fights in which Ali was officially knocked down in the ring, and for inspiring the 1976 film "Rocky".
Document 9: 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.
Document 10: Facing Ali (book): Facing Ali is a 2002 book authored by Stephen Brunt; it is about fifteen different fighters from around the world who battled with Muhammad Ali in boxing fights. In each chapter of the book, one of the selected fighters recalls the experience of fighting with Ali. The profiled fighters include Ali's famous opponents like George Foreman, Joe Frazier, and Ken Norton; and also the relatively obscure like the German butcher Jurgen Blin who "was back at work at the sausage factory" after having fought with Ali the previous day. Other fighters profiled in the book include Tunney Hunsaker, Jean Pierre Coopman, Henry Cooper, Ron Lyle, Chuck Wepner, George Chuvalo and Larry Holmes.
Document 11: Cassius Marcellus Clay Sr.: Cassius Marcellus Clay (November 11, 1912 – February 8, 1990) was an American painter and musician. He was the father of three-time World Heavyweight Champion Muhammad Ali and Rahman Ali, and the grandfather of Laila Ali. He married Odessa Lee O'Grady in the 1930s and worked as a painter and a musician. He was described as "a handsome, mercurial, noisy, combative failed dreamer" and a "hard-drinking, skirt-chasing dandy of a daddy". His son Muhammad Ali described him as "the fanciest dancer in Louisville".
Document 12: The Rumble in the Jungle: The Rumble in the Jungle was a historic boxing event in Kinshasa, Zaire (now Democratic Republic of the Congo) on October 30, 1974 (at 4:00 am). Held at the 20th of May Stadium (now the Stade Tata Raphaël), it pitted the undefeated world heavyweight champion George Foreman against challenger Muhammad Ali, a former heavyweight champion; the attendance was 60,000. Ali won by knockout, putting Foreman down just before the end of the eighth round. It has been called "arguably the greatest sporting event of the 20th century". The event was one of Don King's first ventures as a professional boxing promoter.
Document 13: Shorty Hogue: Willis 'Shorty' Hogue was a boxer in California during the 1940s, along with Lloyd Marshall, Charley Burley, Jack Chase (Young Joe Louis), Archie Moore and Eddie Booker. He had a twin brother, Willard, known as "Big Boy" Hogue, who also boxed in this era. No complete record exists for either brother, but Shorty Hogue was once ranked #3 at middleweight by Ring magazine. He scored three wins over Archie Moore and beat Jack Chase, Johnny "Bandit" Romero and Eddie Booker. His win over Booker earned him the California Middleweight Championship. Around this time, the World Championships were frozen by World War II, and most of the best middleweights of the era fought over the California title. Charley Burley stopped Hogue in 1942, and after that, Hogue's career hit the doldrums. Most of Hogue's bouts after this were knockout losses, including one to Eddie Booker, in which he lost the California Middleweight Championship. There is no record of his career outside of the years 1939 to 1942, but in those three years, he went 55-1. His only loss was to his cousin, Kole, whose record was an amazing 89-0.
Document 14: Muhammad Ali vs. Sonny Liston: The two fights between Muhammad Ali and Sonny Liston for boxing's World Heavyweight Championship were among the most anticipated, watched and controversial fights in the sport's history. "Sports Illustrated" magazine named their first meeting, the Liston–Clay fight (Ali had not yet changed his name from Cassius Clay), as the fourth greatest sports moment of the twentieth century.
Document 15: 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.
ground_truth: 1972