Complex sentence: Seatac/Airport Station, the Sound Transit Link Light Rail station, serving Sea-Tac Airport and the city of SeaTac, Washington, is the current terminus of the Sound Transit Central Link light rail line that connects the airport with downtown seattle.
Split into simpler sentences: Seatac/Airport Station is a Sound Transit Link Light Rail station serving Sea-Tac Airport and the city of SeaTac, Washington. It is the current terminus of the Central Link light rail line that connects the airport with Downtown Seattle.