Complex sentence: His message mentioned his recent trip on the Space Shuttle and was one of 33 such by notable individuals including Caesar Chavez, Coretta Scott King, Carl Sagan, Jessie Jackson and Peter Ueberroth.
Split into simpler sentences: His message mentioned his recent trip on the Space Shuttle. He was one of 33 individuals including Caesar Chavez, Coretta Scott King, Carl Sagan, Jessie Jackson and Peter Ueberroth.