Complex sentence: After years of hibernation, the Sokol movement was revived for the fourth time in 1990; a slet was held in 1994 (with 23,000 Sokols participating), after the fall of Communism.
Split into simpler sentences: After years of hibernation, the Sokol movement was revived for the fourth time in 1990. A "slet" was held in 1994 (with 23,000 Sokols participating), after the fall of Communism.