Complex sentence: East of the city, NY 3 passes south of the Oswego County Airport as it heads to the northeast through Palermo to the village of Mexico where it meets NY 104 once again.
Split into simpler sentences: East of the city, NY 3 passes south of the Oswego County Airport as it heads to the northeast through Palermo. It proceeds north to the village of Mexico, where it meets NY 104 once again.