Complex sentence: Sebring also discovered martial arts legend Bruce Lee who was giving an demonstration of his unbelievable talents at the International Karate Championships in Long Beach in 1964, he introduced Bruce to his producer friend Bill Dozier who started Bruce's career with "the Green Hornet".
Split into simpler sentences: Sebring also discovered martial arts legend Bruce Lee who was giving an demonstration of his unbelievable talents at the International Karate Championships in Long Beach in 1964. He introduced Bruce to his producer friend Bill Dozier who started Bruce's career with "the Green Hornet".