Complex sentence: Two other extermination camps, Sobibor and Majdanek, were set up in the Lublin district subsequently, with the Lipowa camp becoming a subcamp of the latter in 1943.
Split into simpler sentences: Two other extermination camps, "Sobibor" and "Majdanek", were later set up in the Lublin district. The "Lipowa" camp became a subcamp of the latter in 1943.