Question: What two cities are home to the port of entry situated at the north end of the Port Subdivision railroad line?

<P0-S0> The Port of Albany–Rensselaer, widely known as the Port of Albany, is a port of entry in the United States with facilities on both sides of the Hudson River in Albany and Rensselaer, New York. <P0-S1>  Private and public port facilities have existed in both cities since the 17th century, with an increase in shipping after the Albany Basin and Erie Canal were built with public funds in 1825. <SEP> <P1-S0>  The line runs from Selkirk north to Albany along a former New York Central Railroad line. <P1-S1> The Port Subdivision is a railroad line owned by CSX Transportation in the U.S. state of New York. <P1-S2>  At its south end, the Port Subdivision junctions with the Castleton Subdivision and River Subdivision; its north end is at the Port of Albany, served by the Albany Port Railroad. <SEP> <P2-S0>  The left track which goes west from the #1 is known as A-2, and serves as a departure track to Memphis, and if the cutoff is out of service, all northbound departures. <P2-S1>  From here in Madison begins the double track that stays for another 22 miles south to Brentwood, Tennessee. <P2-S2>  At Oak Street, our main terminal line goes south two miles to 000189.0 known as Criaghead or Vine Hill. <P2-S3>  This is the Wye track that connects the main with the Bruceton side, while rarely used for mainline trains, locals and river jobs use it. <P2-S4>  And there is also a connection/delivery track to the Nashville and Eastern Railroad which connects the Tennessee Central Railroad Museum to a major railroad. <P2-S5>  On the #1 track about a half a mile south, another connecting track is present. <P2-S6>  The right track diverging from the #2 is known as A-1, it is for departure trains to Chattanooga and Atlanta. <P2-S7>  This begins part of the Chattanooga Sub or J-Line. <P2-S8>  The B-Line which meets the #1 track is used for departures out of the C yard and local jobs. <P2-S9>  The right track is the main, S&NA North, while the left track is the Nashville Subdivision which runs to Columbia and exchanges freight with the TSRR. <P2-S10>  Further down the double track ends at Glencliff (00J4.9). <P2-S11>  About 4/10ths of a mile down the line from Fogg St, 000187.4, Oak St, is a crossover track from #2 to #1 (the track names are no longer 3 and 12, but are back to regular names). <P2-S12>  This is also where the Ex-NC&StL Chattanooga Subdivision begins. <P2-S13>  From here the regular Terminal goes south to swap crews at Kayne Ave, and the right side, Radnor Cutoff, detours the city and gives yard departures and arrivals direct access to and from Radnor yard to cities like Louisville and Chicago. <P2-S14>  Speed is now at 40. <SEP> <P3-S0> The Tampa Terminal Subdivision is a railroad line owned by CSX Transportation in the U.S. State of Florida. <P3-S1>  There are 3 sections to the Tampa Terminal Subdivision. <P3-S2>  The first section runs from Control Point (CP)-YN to Gary, Florida and is 4 mi in length. <P3-S3>  At its north end it continues south from the Yeoman Subdivision and at its south end the west main leads to the Clearwater Subdivision while the east main leads to the Hooker's Point Lead. <P3-S4>  The second section runs from Mango, Florida to Tampa, Florida and is 8.1 miles in length. <P3-S5>  At its north end it continues south from the Lakeland Subdivision and at its south end it continues south as the Port Tampa Spur. <P3-S6>  The third section runs from Control Point (CP)-YN to East Tampa, Florida and is 7.3 miles in length. <P3-S7>  At its north end it continues south from the Yeoman Subdivision and at its south end it continues south as the Palmetto Subdivision.