Given a question and a context passage, generate the answer having the word or phrase from the context passage. Here, the answer should be a shortest continous span from the passage.

Example Input: Context: Cruz Azul plays in the top division Liga MX at its home venue the Estadio Azul, located in the southwestern part of Mexico City in the Colonia Ciudad de los Deportes, adjacent the Napoles neighborhood. 
 Question: Where do Cruz Azul play their home games?
Example Output: estadio azul

Example Input: Context: Villa Wartholz was designed by Heinrich von Ferstel in the historicist style in the years 1870 to 1872 for Archduke Karl Ludwig of Austria. 
 Question: What is the name of the Villa Wartholz architect?
Example Output: heinrich von ferstel

Example Input: Context: Network Aviation is an airline based at Perth Airport, operating air charter services in support of ''fly-in fly-out'' mining operations throughout Western Australia. 
 Question: Which airport is most closely associated with Network Aviation?
Example Output:
perth airport

