Complex sentence: In May 2008 WLGT Gospel Station became "Glory Radio 98.3" and WLGT Gospel Station became "The Promise 98.3" on June 2008 through October 2010.
Split into simpler sentences: In May 2008 WLGT became "Glory Radio 98.3". The format was "The Promise 98.3" from June 2008 through October 2010.