Complex sentence: Alberto Sánchez (born 2 February 1973) is a retired Cuban hammer thrower, who's personal best throw is 77.78 metres, which he achieved in May 1998 in Havana.
Split into simpler sentences: Alberto Sánchez (born 2 February 1973) is a retired Cuban hammer thrower. His personal best throw is 77.78 metres, which he achieved in May 1998 in Havana.