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

Q: 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?

A: XML
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Q: Context : ``The Next Witness'' is a Nero Wolfe mystery novella by Rex Stout, first published as ``The Last Witness'' in the May 1955 issue of The American Magazine. 
Question : The The Next Witness has what character?

A: Nero Wolfe
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Q: Context : Test automation management tools are specific tools that provide a collaborative environment that is intended to make test automation efficient, traceable and clear for stakeholders. 
Question : The Test automation management tools is based upon what?

A:
test automation
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