Please answer the following question: I want to test the ability of students to read a passage and answer questions about it. Could you please come up with a good question for the passage "The RSFSR was established on November 7, 1917 (October Revolution) as a sovereign state. The first Constitution was adopted in 1918. In 1922 the Russian SFSR signed the Treaty on the Creation of the USSR."?
Answer:
What state came before the USSR?