Which Argentine colonel, jailed and then freed amid mass protests in October 1945, was elected president in 1946?

The 1945 Spingarn Medal went to which actor, singer and activist, who had been a football All-American at Rutgers? Complete the title of the 1945 film: "___ and the Amazons". Which composer won the 1945 Pulitzer Prize for Music for "Appalachian Spring"? Which president's reported last words, in April 1945, were "I have a terrible headache"? Who won the best actress Oscar for "Mildred Pierce" (1945)? Which 1945 best picture is about a weekend alcoholic binge? Which singer starred in the 1933 film version of Eugene O'Neill's "The Emperor Jones"? Who became U.S. president in 1945?