Complex sentence: Tatiana was born at the Denver Zoo on June 27,2003, and was brought to the San Francisco Zoo on December 16,2005, to provide the 14-year-old Siberian tiger, Tony, with a mate.
Split into simpler sentences: Tatiana was born at the Denver Zoo on June 27,2003. She was brought to the San Francisco Zoo on December 16,2005, to provide the 14-year-old Siberian tiger Tony with a mate.