Complex sentence: After the explosion, Treblinka received only about 7,000 Jews from the capital for fear of similar incidents; the remaining 42,000 Warsaw Jews were deported to Majdanek instead.
Split into simpler sentences: After the explosion, Treblinka received only about 7,000 Jews from the capital for fear of similar incidents. The remaining 42,000 Warsaw Jews were deported to Majdanek instead.