Complex sentence: Sookie thinks that she is over 200 years old, but it is revealed later, in the short story "Two Blondes", that she's 160 years old, give or take a decade.
Split into simpler sentences: Sookie thinks that she is over 200 years old. It is later revealed, in the short story "Two Blondes," that she's 160 years old, give or take a decade.