Complex sentence: Young Turk social engineering in Eastern Turkey, 1913--50 "that" the elimination of the Armenian population left the state an infrastructure of Armenian property, which was used for the progress of Turkish (settler) communities.
Split into simpler sentences: Young Turk social engineering in Eastern Turkey, 1913--50. The elimination of the Armenian population left the state an infrastructure of Armenian property, which was used for the progress of Turkish (settler) communities.