Complex sentence: It was inaugurated in 1964 and was a major event in the sixties and seventies, it changed its name to the Oxfordshire Trophy in 1982 but reverted to its original name in 2008.
Split into simpler sentences: It was inaugurated in 1964 and was a major event in the 1960s and 1970s. It changed its name to the Oxfordshire Trophy in 1982 but reverted to its original name in 2008.