I want to know the answer to the following question:
When did the RSFSR cease to be a part of the Soviet Union?
All the background I'm provided with is that "To the west it bordered Finland, Norway and Poland; and to the south, China, Mongolia and North Korea whilst bordering the Arctic Ocean to the north, the Pacific Ocean to the east and the Black sea and Caspian Sea to the south.". Is that enough to answer the question?