Complex sentence: Graue continued to write the strip until his August, 2001 retirement; on December 10,2001, the 75-year-old Graue was killed in Flat Rock, North Carolina when a dump truck hit his car.
Split into simpler sentences: Graue continued to write the strip until his August, 2001 retirement. Four months later, on December 10,2001, the 75-year-old Graue was killed in Flat Rock, North Carolina when a dump truck hit his car.