Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: Passengers have told of the moment the engine of a Southwest Airlines plane caught fire seconds before takeoff in Chicago on Wednesday night, forcing the jet to make an emergency landing. Southwest Airlines says no one was injured when the plane aborted takeoff at Midway International Airport due to a 'mechanical issue'. Airline spokeswoman Emily Samuels says emergency responders met the Boston-bound plane Wednesday night and that the 143 passengers exited via air stairs and returned to the terminal. Chicago Fire Department spokesman Cmdr. Frank Velez tells the Chicago Tribune one of the plane's engines caught fire, but the airplane has since been secured.Flight 3299 bound for Boston aborted takeoff late Wednesday nightVideo inside the cabin shows the right engine sparking and catching fireSouthwest Airlines said it was a 'mechanical issue'Fire Department said the engine overheatedAll 143 passengers were evacuated and there were no injuries 
 Question:Passengers were flown to _ in another aircraft early Thursday.

Boston