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.

[EX Q]: Sentence: 'Nazi Germany 's attack on the Soviet Union in June 1941 extended the zone of killing operations even farther east .', Argument/Subject 1: 'germany', Argument/Subject 2: 'soviet union'
[EX A]: attack

[EX Q]: 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'
[EX A]: be version of

[EX Q]: Sentence: 'NATO members , including the United States , certainly have not expressed a willingness to take on this role generally : they did not act in Rwanda and resisted action in Bosnia .', Argument/Subject 1: 'unite state', Argument/Subject 2: 'nato'
[EX A]:
be member of