Complex sentence: That turned out to be Gleason's most prescient move: a decade afterward, they aired the half-hour "Honeymooners" in syndicated reruns that began to build a loyal and growing audience that made the show a television icon.
Split into simpler sentences: That turned out to be Gleason's most prescient move. A decade later, he aired the half-hour "Honeymooners" in syndicated reruns that began to build a loyal and growing audience, making the show a television icon.