Complex sentence: The Tiananmen Square protests of 1989 failed to stimulate major political changes in China, but powerful images of courageous defiance during that protest helped to spark a precipitation of events in other parts of the globe.
Split into simpler sentences: The Tiananmen Square protests of 1989 failed to stimulate major political changes in China. However, powerful images of courageous defiance during that protest helped to spark a precipitation of events in other parts of the globe.