Complex sentence: In 1974, Walker opened the Museum of Cartoon Art, the first museum devoted to the art of comics, initially located in Greenwich, Connecticut and Rye Brook, New York before moving to Boca Raton, Florida in 1992.
Split into simpler sentences: In 1974, Walker opened the Museum of Cartoon Art, the first museum devoted to the art of comics. It was initially located in Greenwich, Connecticut, and Rye Brook, New York, before moving to Boca Raton, Florida in 1992.