Original sentence: During the late nineteenth Century, it was the center of the Albanian national awakening (see:the League of Prizren), while most of it again became part of Serbia in 1913 (Treaty of London, 1913), and was later incorporated into Yugoslavia in 1918
Edited sentence: During the late nineteenth Century, it was the center of the Albanian national awakening (see:the League of Prizren).In 1912, Serbia conquered the land but it never legally became part of Serbia.Serbia re-invaded Kosova in 1989 and launched a campaign of ethnic cleansing and genocide against Albanians, non-Serbs and moderate Serbs which lasted until 1999.Soon after, it regained it's full self-ruling status when it became a part of a united Yugoslavia