This task is about creating an unanswerable question based on a given passage. Construct a question that looks relevant to the given context but is unanswerable. Following are a few suggestions about how to create unanswerable questions:
(i) create questions which require satisfying a constraint that is not mentioned in the passage
(ii) create questions which require information beyond what is provided in the passage in order to answer
(iii) replace an existing entity, number, date mentioned in the passage with other entity, number, date and use it in the question
(iv) create a question which is answerable from the passage and then replace one or two words by their antonyms or insert/remove negation words to make it unanswerable.

Let me give you an example: Passage: In 1763, Spain traded Florida to the Kingdom of Great Britain for control of Havana, Cuba, which had been captured by the British during the Seven Years' War. It was part of a large expansion of British territory following the country's victory in the Seven Years' War. Almost the entire Spanish population left, taking along most of the remaining indigenous population to Cuba. The British soon constructed the King's Road connecting St. Augustine to Georgia. The road crossed the St. Johns River at a narrow point, which the Seminole called Wacca Pilatka and the British named "Cow Ford", both names ostensibly reflecting the fact that cattle were brought across the river there.
The answer to this example can be: Who owned Cuba after the Eight Years War?
Here is why: This question appears to be relevant to the passage as both involves words such as 'Cuba' and 'War' which also exist in the passage. The passage mentions that "after the war, almost the entire Spanish population left, taking along most of the remaining indigenous population to Cuba". This information is not sufficient to conclude that which country owned cuba.

OK. solve this:
Passage: Florida is served by Amtrak, operating numerous lines throughout, connecting the state's largest cities to points north in the United States and Canada. The busiest Amtrak train stations in Florida in 2011 were: Sanford (259,944), Orlando (179,142), Tampa Union Station (140,785), Miami (94,556), and Jacksonville (74,733). Sanford, in Greater Orlando, is the southern terminus of the Auto Train, which originates at Lorton, Virginia, south of Washington, D.C.. Until 2005, Orlando was also the eastern terminus of the Sunset Limited, which travels across the southern United States via New Orleans, Houston, and San Antonio to its western terminus of Los Angeles. Florida is served by two additional Amtrak trains (the Silver Star and the Silver Meteor), which operate between New York City and Miami. Miami Central Station, the city's rapid transit, commuter rail, intercity rail, and bus hub, is under construction.
Answer:
What train line connects florida to the south?