Complex sentence: Third Avenue--138th Street is a station on the IRT Pelham Line of the New York City Subway, it is served by the line and is located at Third Avenue and East 138th Street in the Bronx.
Split into simpler sentences: Third Avenue--138th Street is a station on the IRT Pelham Line of the New York City Subway. It is served by the train and is located at Third Avenue and East 138th Street in the Bronx.