Context: Following the breakup of the Russian Empire in the aftermath of World War I for a brief period, from 1918 to 1920, Armenia was an independent republic. In late 1920, the communists came to power following an invasion of Armenia by the Red Army, and in 1922, Armenia became part of the Transcaucasian SFSR of the Soviet Union, later forming the Armenian Soviet Socialist Republic (1936 to September 21, 1991). In 1991, Armenia declared independence from the USSR and established the second Republic of Armenia.

Question: What was Armenia's status from 1918 to 1920?
Answer: independent republic

Question: When did communists take over Armenia?
Answer: late 1920

Question: Who invaded Armenia in 1920?
Answer: the Red Army

Question: What part of the USSR did Armenia join?
Answer: the Transcaucasian SFSR

Question: When did Armenia leave the USSR?
Answer: 1991

Question: When was the Red Army part of an independent republic after the Russian Empire breakup?
Answer: Unanswerable

Question: Who invaded Russia in 1920?
Answer: Unanswerable

Question: When did Russia become independent from the USSR?
Answer: Unanswerable

Question: When did the Russian Empire come to power and invade the Transcaucasian SFSR?
Answer: Unanswerable

Question: What part of the Red Army did the communists join in 1991?
Answer: Unanswerable