After a breakdown around 1919, which Russian-born ballet dancer spent the rest of his life in and out of asylums?

After a five-year legal battle with a sugar company, which pizza chain won the right to keep its name in 1980? After an active reign of 50 years, Wilhelmina stepped down as queen of which country in 1948? After a nine-month war against West Pakistan, which nation gained independence in 1971? After a disastrous performance of his play within the play, Treplev kills a bird in which 1896 Chekhov work? After a close and bitter contest, which Illinois Democrat lost her Senate seat in 1998? After a decades-long fight to reclaim her throne, which former queen died November 11, 1917, in Honolulu? After losing his 1835 bid for re-election to Congress from Tennessee, which frontiersman moved to Texas? After a 1927 demonstration of which new technology did the April 8 New York Times say "commercial use in doubt"?