Complex sentence: Grant was killed in an automobile accident near Titusville in Brevard County, Florida, at the age of seventy-three, en route to watch the launch of the Space Shuttle Challenger at Cape Canaveral.
Split into simpler sentences: Grant was killed in an automobile accident near Titusville in Brevard County, Florida, at the age of seventy-three. He was en route to watch the launch of the Space Shuttle Challenger at Cape Canaveral.