Complex sentence: Dexter's eldest sister Yolanda collapsed at the home of Dexter's best friend Philip Madison Jones on May 15,2007, she could not be revived and died at the age of 51, her family believes she had a heart condition.
Split into simpler sentences: Dexter's eldest sister, Yolanda, collapsed at the home of Dexter's best friend Philip Madison Jones on May 15,2007. She could not be revived and died at the age of 51, her family believes she had a heart condition.