Given a sentence and two mentions from the text (arguments), indicate a phrase (a verb or noun phrase) that describes the relationship between the provided arguments.

Input: Consider Input: Sentence: 'XHTML is a modified version of HTML that is fully XML compatible , so that it can be processed by XML parsers .', Argument/Subject 1: 'xhtml', Argument/Subject 2: 'html'

Output: be version of


Input: Consider Input: Sentence: 'But even though it 's the poorest country in South America , Bolivia is surprisingly self-sufficient with ample supplies of oil , natural gas and other natural resources .', Argument/Subject 1: 'bolivium', Argument/Subject 2: 'south america'

Output: be country in


Input: Consider Input: Sentence: 'PNC will buy National City for about $ 5.2 billion in PNC stock .', Argument/Subject 1: 'pnc', Argument/Subject 2: 'national city'


Output: buy