[Q]: I know that the answer to the question "Why is United Air relevant to the train lines for Amtrak?" is in "Union Station is further served by four Amtrak lines: the Northeast Regional and the high-speed Acela Express provide service to New York, Washington, D.C. and Boston, and rank as the first and second busiest routes in the country; the New HavenSpringfield Line provides service to Hartford and Springfield, Massachusetts; and the Vermonter provides service to both Washington, D.C., and Vermont, 15 miles (24 km) from the Canadian border. Amtrak also codeshares with United Airlines for travel to any airport serviced by United Airlines, via Newark Airport (EWR) originating from or terminating at Union Station, (IATA: ZVE).". Can you tell me what it is?
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[A]: Amtrak also codeshares with United Airlines

[Q]: I know that the answer to the question "What is one possible thing that changes during the teenage years?" is in "A thorough understanding of adolescence in society depends on information from various perspectives, including psychology, biology, history, sociology, education, and anthropology. Within all of these perspectives, adolescence is viewed as a transitional period between childhood and adulthood, whose cultural purpose is the preparation of children for adult roles. It is a period of multiple transitions involving education, training, employment and unemployment, as well as transitions from one living circumstance to another.". Can you tell me what it is?
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[A]: one living circumstance to another

[Q]: I know that the answer to the question "What kept Bell from training instructors at the Boston School for Deaf Mutes?" is in "Bell's father was invited by Sarah Fuller, principal of the Boston School for Deaf Mutes (which continues today as the public Horace Mann School for the Deaf), in Boston, Massachusetts, to introduce the Visible Speech System by providing training for Fuller's instructors, but he declined the post in favor of his son. Traveling to Boston in April 1871, Bell proved successful in training the school's instructors. He was subsequently asked to repeat the program at the American Asylum for Deaf-mutes in Hartford, Connecticut, and the Clarke School for the Deaf in Northampton, Massachusetts.". Can you tell me what it is?
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[A]: his son

[Q]: I know that the answer to the question "In the Messeschnellweg, what roads combine at the end?" is in "The Schnellweg (en: expressway) system, a number of Bundesstrae roads, forms a structure loosely resembling a large ring road together with A2 and A7. The roads are B 3, B 6 and B 65, called Westschnellweg (B6 on the northern part, B3 on the southern part), Messeschnellweg (B3, becomes A37 near Burgdorf, crosses A2, becomes B3 again, changes to B6 at Seelhorster Kreuz, then passes the Hanover fairground as B6 and becomes A37 again before merging into A7) and Sudschnellweg (starts out as B65, becomes B3/B6/B65 upon crossing Westschnellweg, then becomes B65 again at Seelhorster Kreuz).". Can you tell me what it is?
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[A]:
A37 again before merging into A7