Complex sentence: Colin Dibley (born 19 September 1944 in Sydney, NSW) is a former tennis player from Australia, who once held the title for the fastest serve in the world at 148 m.p.h.
Split into simpler sentences: Colin Dibley (born 19 September 1944 in Sydney, NSW) is a former tennis player from Australia. Dibley once held the title for the fastest serve in the world at 148 m.p.h.