Complex sentence: Emanuela Orlandi (born January 14,1968), a citizen of Vatican City, and Vatican employee Ercole Orlandi's daughter, mysteriously disappeared on June 22,1983 at the age of fifteen.
Split into simpler sentences: Emanuela Orlandi (born January 14,1968) was a citizen of Vatican City, and Vatican employee Ercole Orlandi's daughter. She mysteriously disappeared on June 22,1983 at the age of fifteen.