Question: When did the state officially named Украинская Советская Социалистическая Республика, also known as  Украинская ССР cease to exist?
Choices:
2005-02-21
2009-03-18
1953-12-31
1854
1917-11-07
2000-03-26
1940-10-31
1872-04-06
1976-07-02
1991-08-24