Which famous Milan opera house opened in 1778?

Which oil billionaire, who died in 1976, was famous for the pay phone he installed for guests at his English mansion, S… Which TV series about a pioneer family was set in Walnut Grove, Minnesota? What is the name of the condition characterized by frequent, uncontrollable episodes of deep sleep? Who scored the first perfect 10 in Olympic gymnastics history, at the 1976 Montreal Games? In which 1976 film does the hero shout "Yo, Adrian!"? "You just slip out the back, Jack, make a new plan, Stan" are lyrics from which 1976 No. 1 hit? Which 1976 film features the line "You talkin' to me?" Who won the 1976 U.S. presidential election?