Generate a correct and concise answer for the question based on the words in the context.

Ex Input:
Context : OPML (Outline Processor Markup Language) is an XML format for outlines (defined as ``a tree, where each node contains a set of named attributes with string values''). 
Question : Which is the basis of OPML?

Ex Output:
XML


Ex Input:
Context : After twelve years of marriage, Hannah Van Buren contracted tuberculosis and died on February 5, 1819, at the age of thirty-five. 
Question : What illness did Hannah Van Buren suffer from?

Ex Output:
tuberculosis


Ex Input:
Context : Ronald Cheng started his relationship with Charlene Choi, a popular Hong Kong female singer and actress, in 2004, after starring as lovers in the film Hidden Heroes. 
Question : What is Ronald Cheng's spouse's name?

Ex Output:

Charlene Choi