I want to know the answer to the following question:
What regions remained part of the Soviet Union?
All the background I'm provided with is that "Of all other territories annexed by the USSR in 1939–40, the ones detached from Finland (Karelia, Petsamo), Estonia (Ingrian area and Petseri County) and Latvia (Abrene) remained part of the Russian Federation, the successor state of the Soviet Union, after 1991.". Is that enough to answer the question?
Answer: yes