You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.
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Question: Category: SUBWAY STOPS 
Clue: You can ride one line in this world capital from Kifissia to Pireas

Answer: athens


Question: Category: THE VICE PRESIDENCY 
Clue: Cardiological term often used for the distance the vice president is "away" from the most powerful office in the land

Answer: heartbeat


Question: Category: CLASSICAL MUSIC 
Clue: The well-traveled Felix Mendelssohn wrote "Italian" & "Scottish" ones

Answer:
symphonies