Complex sentence: Suburban Station was the terminus of the commuter rail lines of the Pennsylvania Railroad (PRR), and the Reading Company (RDG) ran trains into Reading Terminal (one block north of where Market East Station was built).
Split into simpler sentences: Suburban Station was the terminus of the commuter rail lines of the Pennsylvania Railroad (PRR). The Reading Company (RDG) ran trains into Reading Terminal (one block north of where Market East Station was built).