Complex sentence: Gasnier was born and raised in the southern Sydney suburb of Kogarah where it was here at the local Kogarah Intermediate High School Gasnier first used and began to hone his natural sporting ability playing rugby, cricket, baseball and athletics.
Split into simpler sentences: Gasnier was born and raised in the southern Sydney suburb of Kogarah. At Kogarah Intermediate High School Gasnier began to hone his natural sporting ability playing rugby, cricket, baseball and athletics.