Complex sentence: Sharon Station was passenger and freight from 1905 until March 22,1972 and freight only until March 27,1980 when Conrail abandoned service on that segment of the line.
Split into simpler sentences: Sharon Station was passenger and freight from 1905 until March 22,1972. It was freight from March 27,1972 until it's closure in 1980, when Conrail abandoned service on that segment of the line.