Question: In what year was the train service that includes the "Palmetto" introduced?

Context paragraphs:
Tequila Express: The Tequila Express (or Tequila Train) is a Mexican regional train service that operates from Guadalajara, Jalisco, to the Tequila Herradura distillery at the San José del Refugio Hacienda in the municipality of Amatitán, Jalisco.  Amatitán is approximately 40 km northwest of Guadalajara and 32 km southeast of the town of Tequila, Jalisco.  The train service is so named because it features tequila tastings and transports its passengers through blue agave fields to the distillery in Amatitán and towards (but not into) the town of Tequila.

Silver Meteor: The Silver Meteor is a passenger train operated by Amtrak between New York City and Miami, Florida.  The first diesel-powered streamliner between New York and Florida, since being introduced by the Seaboard Air Line Railroad (SAL) in 1939, it remains in operation now.  The train is part of Amtrak's "Silver Service" along with the "Silver Star", another former SAL streamliner.

Rail replacement bus service: A rail replacement bus service uses buses to replace a passenger train service either on a temporary or permanent basis.  The train service that is replaced may be of any type such as light rail, tram, streetcar, commuter rail, regional rail or heavy rail, intercity passenger service.  The rail service may be replaced if the line is closed due to rail maintenance, a breakdown of a train, a rail accident, strike action, or if the rail service is not economically viable.

München-Nürnberg-Express: The München-Nürnberg-Express (literally: "Munich-Nuremberg Express") is a RegionalExpress train service in the southern German state of Bavaria, connecting the two main cities of the state, Munich and Nuremberg.  With its maximum speed of 200 km/h (125 mph), the train is currently (as of 2011 ) the fastest regional train service in Germany.  The train was formerly known under the project name FRESH, expanding to FRanken-Express über die Schnellfahrstrecke in die LandesHauptstadt ("FRanconia Express via the High speed line to the state Capital").

Rapido (train): Rapido was the brand name for the Canadian National Railway's (CN) express passenger train service in the Quebec City–Windsor Corridor.  "Rapido" service was introduced on October 31, 1965 and lasted until the end of CN passenger train service with its transfer to VIA on October 29, 1978.

Cariboo Prospector: The Cariboo Prospector or "Cariboo Dayliner" or The BC Rail Budd cars was a passenger train service in British Columbia, Canada, which used Budd Rail Diesel Car trains.  It was operated by the Pacific Great Eastern, later known as the British Columbia Railway Company and then BC Rail.  The train ran from BC Rail's North Vancouver railway station, the one located a few blocks from the current North Vancouver railway station used by the "Rocky Mountaineer", and ran to Lillooet railway station.  From there a section was split from the train that would continue down to Prince George BC Rail station located in BC Rail's Prince George yards.  This train service ended along with the other BC Rail passenger services in 2002.  A section serving the line between Lillooet, Seton Portage, and D'Arcy was replaced by the Koaham Shuttle.

Cape May City Rail Terminal: The Cape May City Rail Terminal is a passenger train station in Cape May, New Jersey.  The station offered train service from 1863 through 1983.  Train service resumed in 1999, but stopped in 2005 due to structural concerns, but resumed again in 2010.  The terminal is located at the intersection of Lafayette St & Elmira St.

Capital Express (Turkey): The Capital Express (Turkish: Başkent Ekspresi ) was one of the six daily intercity trains operating between Istanbul and Ankara on the Istanbul-Ankara railway before the Yüksek Hızlı Tren high-speed train service replaced all intercity trains on the line.  The Capital Express was the fastest of the six trains, making limited stops only in large cities.  The train would complete it's journey in just over four hours and in the Eskişehir Province, trains would reach conventional speeds of 150 km/h , which still hold the record for fastest conventional train service in Turkey.  When the high-speed rail service was opened between Ankara and Eskişehir on 13 March 2009, the Capital Express, along with the other five intercity trains, were cut back between Istanbul and Eskişehir.  During this period two more daily intercity trains were added, the Sakarya Express and Eskişehir Express, increasing daily intercity service to eight trains.

Palmetto (train): The Palmetto is a passenger train service operated by Amtrak over the 829 mi from New York City south to Savannah, Georgia, via the Northeast Corridor to Washington, D.C., then via Richmond, Virginia, Fayetteville, North Carolina, and Charleston, South Carolina.  The "Palmetto" is a shorter version of the "Silver Meteor", which continues south to Miami, Florida.  Between 1996 and 2002 this service was called the Silver Palm.  Although currently a day train, in the past the "Palmetto" provided overnight sleeper service to Florida.

Tsurugi (train): The Tsurugi (つるぎ ) is a high-speed "shinkansen" train service operated by West Japan Railway Company (JR West) between Toyama and Kanazawa on the Hokuriku Shinkansen line in Japan.  The shinkansen service was introduced on 14 March 2015, but the name was first used for a limited express overnight "Blue Train" sleeping car train service operated by Japanese National Railways (JNR) and later by JR West from 1961 until 1994.  It was named after Mount Tsurugi.

Supporting paragraphs: Palmetto (train) Silver Meteor
Answer: 1939