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 the territories of Poland annexed by the Soviet Union between 1939 and 1940, the region around Białystok and a minor part of Galicia east of the San river around Przemyśl were returned to the Polish state at the end of World War II.". Is that enough to answer the question?
Answer: no