Complex sentence: The station survived the merger between the New York Central Railroad and the PRR that formed Penn Central; however, upon the establishment of Amtrak in 1971 very limited passenger services to the station survived-eventually dwindling to 2 trains each, Monday-Friday.
Split into simpler sentences: The station survived the merger between the New York Central Railroad and the PRR that formed Penn Central. Upon the establishment of Amtrak in 1971 very limited passenger services to the station survived-eventually dwindling to 2 trains each way, each day, Monday-Friday.