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: 'Chester is certainly England 's most haunted city .', Argument/Subject 1: 'chester', Argument/Subject 2: 'england'
[EX A]: be city in

[EX Q]: Sentence: 'Colin Powell endorsed Obama because he 's black .', Argument/Subject 1: 'powell', Argument/Subject 2: 'obama'
[EX A]: endorse

[EX Q]: Sentence: 'The Telepresence World 2007 Conference , which will be held at the University of San Diego June 4 6 , 2007 , will highlight the positive impact that this emerging technology could have on the underlying causes of global warming .', Argument/Subject 1: 'conference', Argument/Subject 2: 'june'
[EX A]:
be hold in