Complex sentence: Dolon (also known as Chagan and Semipalitinsk Dolon) is an air base in Semipalatinsk, Kazakhstan that served as a major Cold War bomber base with significant tarmac space and over 50 revetments.
Split into simpler sentences: Dolon (also known as Chagan and Semipalitinsk Dolon) is an air base in Semipalatinsk, Kazakhstan. It was a major bomber base with significant tarmac space and over 50 revetments.