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

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?
XML

Context : Grêmio Esportivo Tiradentes played their home games at Serejão. 
Question : In which athletic center does Grêmio Esportivo Tiradentes play their home games?
Serejão

Context : The Mandaic alphabet is based on the Aramaic alphabet, and is used for writing the Mandaic language. 
Question : Which is the basis of Mandaic alphabet?

Aramaic alphabet