After disbanding in 1968, which duo reunited in 1974 and had a No. 3 hit with "Rock and Roll Heaven"?

After declining the throne of Greece, Leopold I became king of which country in 1831? After defeating the Kuomintang in 1949, Mao proclaimed the People's Republic of China at which square? After developing his Maine Hunting Shoe around 1911, which outdoorsman opened a mail-order business? After Dik Browne retired in 1988, his son Chris took over which Viking comic strip? After reaching the Mississippi River on May 8, 1541, which explorer spent weeks building barges to cross it? After divorcing British tennis player John Lloyd in 1987, which tennis star married former Olympic skier Andy Mill? After divorcing Robert Walker, Jennifer Jones married which "Gone with the Wind" producer in 1949? After Dolley Payne's first husband died of yellow fever in 1793, whom did she marry?