Background: Ventura was born James George Janos on July 15, 1951 in Minneapolis, Minnesota, the son of George William Janos and his wife, Bernice Martha (nee Lenz). Both of his parents were World War II veterans. Ventura has an older brother who served in the Vietnam War. Ventura has described himself as Slovak, since his father's parents were from what is now Slovakia; his mother was of German descent.
Context: Ventura ran for Governor of Minnesota in 1998 as the nominee for the Reform Party of Minnesota (he later joined the Independence Party of Minnesota when the Reform Party broke from its association with the Reform Party of the United States of America). His campaign consisted of a combination of aggressive grassroots events organized in part by his campaign manager Doug Friedline and original television spots, designed by quirky adman Bill Hillsman, using the phrase "Don't vote for politics as usual." He spent considerably less than his opponents (about $300,000) and was a pioneer in his using the Internet as a medium of reaching out to voters in a political campaign.  He won the election in November 1998, narrowly (and unexpectedly) defeating the major-party candidates, St. Paul mayor Norm Coleman (Republican) and Minnesota Attorney General Hubert H. "Skip" Humphrey III (Democratic-Farmer-Labor). During his victory speech, Ventura famously declared, "We shocked the world!" After his election, bumper stickers and T-shirts bearing the slogan "My governor can beat up your governor" appeared in Minnesota. The nickname "Jesse 'The Mind'" (from a last-minute Hillsman ad featuring Ventura posing as Rodin's Thinker) began to resurface sarcastically in reference to his frequently controversial remarks. Ventura's old stage name "Jesse 'The Body'" (sometimes adapted to "Jesse 'The Governing Body'") also continued to appear with some regularity.  After a trade mission to China in 2002, Ventura announced that he would not run for a second term, stating that he no longer felt dedicated enough to his job to run again as well as what he viewed were constant attacks on his family by the media. Ventura accused the media of hounding him and his family for personal behavior and belief while neglecting coverage of important policy issues. He later told a reporter for The Boston Globe that he would have run for a second term if he had been single, citing the media's effect on his family life.  Governor Ventura sparked media criticism when, nearing the end of his term, he suggested that he might resign from office early to allow his lieutenant governor, Mae Schunk, an opportunity to serve as governor. He further stated that he wanted her to be the state's first female governor and have her portrait painted and hung in the Capitol along with the other governors. Ventura quickly retreated from the comments, saying he was just floating an idea.
Question: how old was he at the time?

Answer: