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.

Ex Input:
Context: The Narym River is a river in the Eastern Kazakhstan, a tributary of the Irtysh River, originating at the junction of the ridges Narym and Sarymsakty of wetland formed by the mountain runoff streams. 
 Question: The body of water that Narym River is near is what?

Ex Output:
irtysh river


Ex Input:
Context: In 2000, the label moved from Brussels to London and was renamed PIAS Recordings. 
 Question: What city is the band PIAS Recordings from?

Ex Output:
brussels


Ex Input:
Context: FictionBook is an open XML-based e-book format which originated and gained popularity in Russia. 
 Question: Which is the basis of FictionBook?

Ex Output:

xml