Question: What is the birthday of Greg Gagne's father?

full_context: Document 1: Chavo Guerrero Sr.: Salvador Guerrero III (January 7, 1949 – February 11, 2017), better known as Chavo Guerrero or Chavo Guerrero Sr., and also known during the 21st century as "Chavo Classic", was an American professional wrestler. He was best known for his work in Universal Wrestling Federation (UWF), American Wrestling Association (AWA) and World Wrestling Entertainment (WWE) and for being the father of third generation wrestler Chavo Guerrero Jr. He was the oldest son of Salvador "Gory" Guerrero, and part of the Guerrero wrestling family. He was the oldest WWE Cruiserweight Champion.
Document 2: Greg Gagne (wrestler): Gregory Alan Gagne ( ; born July 27, 1948) is a retired American professional wrestler. He is the son of Verne Gagne. In the late 1970s and early 1980s, he achieved his biggest success as one half of the tag team The High Flyers with Jim Brunzell. The High Flyers enjoyed a number of high-profile feuds within the AWA with the likes of Bobby Duncum and Blackjack Lanza, Pat Patterson and Ray "The Crippler" Stevens, The East-West Connection (Adrian Adonis and Jesse "The Body" Ventura), and The Shieks (Ken Patera and Jerry Blackwell).
Document 3: René Duprée: René Emile Goguen (born December 15, 1983) is a Canadian professional wrestler, better known by his ring name René Duprée. Goguen is best known for his tenure in World Wrestling Entertainment, where he is a one-time World Tag Team Champion with Sylvain Grenier as the tag team La Résistance and a one-time WWE Tag Team Champion with Kenzo Suzuki. By winning the World Tag Team Championship, Goguen became the youngest wrestler to win the tag team title at 19 years old. He is also the youngest champion of any kind in WWE, and the first wrestler in WWE to win a title as a teenager. He is the son of Canadian Maritimes wrestling promoter Emile Duprée.
Document 4: AWA United States Heavyweight Championship: The AWA United States Championship was a short-lived title in the early days of the American Wrestling Association. It started out as the NWA United States Championship promoted in the Chicago, Illinois from 1953 until 1958. in 1958 then champion Verne Gagne created the American Wrestling Association (AWA) based on Minneapolis, Minnesota and took the championship with him, claiming the lineage of the Chicago version. The Chicago promotion recognized Wilbur Snyder as their next champion, splitting the lineage into their own NWA United States Heavyweight Championship. The Minneapolis version of the championship was renamed the AWA United States Championship in 1960.
Document 5: The Wrestler (1974 film): The Wrestler is a 1974 independent film produced by professional wrestler Verne Gagne and W.R. Frank, starring Ed Asner as "Frank Bass", a wrestling promoter. Verne Gagne also stars in the movie as Mike Bullard, the current wrestling champion of his "league." After a long reign as champion, Bullard is getting older and feeling pressure from all sides, including his wife and wrestling promoters, to pass the championship to Billy Taylor and retire. Bullard's resistance to their requests that he step aside is the central conflict in the film. The movie presents professional wrestling as a truly competitive sport, always maintaining the illusion that matches are a result of athletic combat and not pre-determined outcomes decided before the matches.
Document 6: Wally Karbo: Walter Joseph Karbo (August 14, 1915 – March 23, 1993) was an American professional wrestling promoter and co-founder of the American Wrestling Association with Verne Gagne. A longtime promoter in the Minneapolis-area, Karbo was a close associate of Tony Stecher and attended the first meeting of the National Wrestling Alliance held by Stecher in 1948.
Document 7: Hart wrestling family: The Hart wrestling family, sometimes known as the Hart dynasty is a mainly Canadian family with a significant history within professional wrestling. The patriarch of the family was wrestling legend Stu Hart (1915–2003). An amateur and professional wrestling performer, promoter and trainer, Stu not only owned and operated his own wrestling promotion, Stampede Wrestling, but also trained some of the most well known and successful stars in wrestling history including Superstar Billy Graham, Fritz Von Erich, Edge, Chris Jericho, Chris Benoit, Christian and his sons Bret Hart and Owen Hart. All of Stu's eight sons were wrestlers and two of them, Bret and Owen, achieved considerable fame and success in the World Wrestling Federation (WWF, now WWE), with many of the WWF's biggest storylines in the mid-1990s being built around Bret and Owen and their brothers-in-law.
Document 8: Verne Gagne: Laverne Clarence Gagne ( ; February 26, 1926 – April 27, 2015) was an American professional wrestler, football player, wrestling trainer, and wrestling promoter. He was the owner and promoter of the Minneapolis-based American Wrestling Association (AWA), the predominant promotion throughout the Midwest and Manitoba for many years. He remained in this position until 1991, when the company folded.
Document 9: Vince McMahon Sr.: Vincent James "Vince" McMahon Sr. (July 6, 1914 – May 24, 1984), commonly known as Vincent J. McMahon or simply Vince McMahon Sr., was an American professional wrestling promoter. He is best known for running the Capitol Wrestling Corporation (subsequently renamed as the World Wide Wrestling Federation and World Wrestling Federation during his tenure, and currently named WWE) from 1954 to 1982, and fathering his successor, Vince McMahon.
Document 10: The Von Steigers: Kurt and Karl Von Steiger was the ring name of professional wrestlers Lorne Corlett and Arnold Pastrick worked under for most of their careers. The Von Steiger gimmick was that of two German villains, called heels, despite both wrestlers hailing from Winnipeg, Manitoba, Canada. Arnold Pastrick used the name Kurt Von Steiger, and Lorne Corlett worked as Karl Von Steiger. The Von Steigers are best known for competing in Pacific Northwest Wrestling in Portland, Oregon between 1968 and 1973 but also competed in Tennessee, San Francisco, Stampede Wrestling, Australia, the American Wrestling Alliance and the Carolina territory.
Document 11: Bob Orton: Robert Keith Orton Sr. (July 21, 1929 – July 16, 2006) was an American professional wrestler.
Document 12: John Garea: John "Johnny" Garea (born 1949) is a semi-retired New Zealand professional wrestler, known by his ring name Johnny Garcia, who competed in Steve Rickard's All Star-Pro Wrestling, World Championship Wrestling and occasionally for the World Wrestling Federation during the 1970s and 80s. The youngest pro wrestler in New Zealand at the time of his debut in 1970, he was a regular on the Australian wrestling programme "Big Time Wrestling" and its New Zealand counterpart "On the Mat" as well as a two-time NWA New Zealand Heavyweight Champion. Garea is the real life brother of four-time WWWF World Tag Team Champion and WWE Road Agent Tony Garea.
Document 13: American Wrestling Association: The American Wrestling Association (AWA) was an American professional wrestling promotion based in Minneapolis, Minnesota that ran from 1960 to 1991. It was owned and founded by Verne Gagne and Wally Karbo. The territory was originally part of the National Wrestling Alliance (NWA), becoming an independent territory in the late 1950s.
Document 14: Fred Kohler (wrestling promoter): Frederick Koch (January 6, 1903 - August 24, 1969), known professionally as Fred Kohler, was an American wrestling promoter who produced the popular DuMont Television Network program "Wrestling From Marigold" (1949-1955). Kohler promoted matches in Chicago, Illinois for over thirty years and was responsible for such talents as Verne Gagne and promoter Jim Barnett. He was also president of the National Wrestling Alliance from 1961 to 1962.
Document 15: Turner's Arena: Turner's Arena was the name given to a 2,000 seat arena, located near the northeast corner of 14th and W Streets, NW in Washington, DC, and originally owned by local wrestling promoter Joe Turner. This venue was an early home to the Capitol Wrestling Corporation, a precursor to World Wrestling Entertainment, which was started by Vincent J. McMahon in January 1953. McMahon took over the territory from Gabe Menendez, who had succeeded Turner after his death in 1947. In addition, the arena hosted top professional boxing matches promoted by Goldie Ahearn featuring fighters such as Lou Gevinson, Lew Hanbury, and Jimmy Cooper. It was also the birthplace of the Central Intercollegiate Athletic Association annual basketball tournament, as well as the host to top country music acts and Jazz performances. It was renamed Capitol Arena in 1956 once Capitol Wrestling Corporation began broadcasting a syndicated weekly wrestling show from the arena every Thursday night.
ground_truth: February 26, 1926