Complex sentence: He filled in for Johnny Carson as guest host of "The Tonight Show" 58 times, and as a guest on the program in 1982, he brought his daughter Lindsey onto the set when she was just 16 weeks old.
Split into simpler sentences: He filled in for Johnny Carson as guest host of "The Tonight Show" 58 times. As a guest in 1982 on The Tonight Show he brought his daughter Lindsey onto the set, she was 16 weeks old.