 Complete the following phrase:  World Wide Wrestling Federation WWWF began airing their monthly television special WWWF on MSG Network on August 7, 1976 after several years of airing their monthly Madison Square Garden shows on HBO. Several notable title changes took place on the show including Bob Backlund winning his first WWWF World Heavyweight Championship by defeating Superstar Billy Graham on February 20, 1978. The show was renamed WWF on MSG Network after the promotion changed its name to World Wrestling Federation in March 1979. The show was an important event and equivalent to todays pay-per-view events. Many important matches and storyline developments took place on the show, for example, Hulk Hogans rise to stardom began on the show when he defeated The Iron Sheik to capture his first WWF Championship on January 23, 1984. With the rise of Hogans popularity and WWFs national expansion, the show lost its significance following the first pay-per-view event 