Complex sentence: After 1989, nearly 300,000 Tatars were able to return to Crimea from their places of deportation, but another roughly 270,000 Crimean Tatars remain in Uzbekistan and other parts of the former Soviet Union.
Split into simpler sentences: After 1989, nearly 300,000 Tatars were able to return to Crimea from their places of deportation. Another roughly 270,000 Crimean Tatars remain in Uzbekistan and other parts of the former Soviet Union.