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.
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Question: Sentence: 'Current Broncos head coach Mike Shanahan coached the Raiders before being fired just four games into the 1989 season , which has only served to intensify this rivalry .', Argument/Subject 1: 'bronco', Argument/Subject 2: 'mike shanahan'

Answer: fire


Question: Sentence: 'DOE- The Department of Energy will hold an open meeting of the Unconventional Resources Technology Advisory Committee on September 11-12 , 2008 at the Hilton Alexandria Old Town .', Argument/Subject 1: 'committee', Argument/Subject 2: 'september'

Answer: meet in


Question: Sentence: 'USP refers to United States Pharmacopeia .', Argument/Subject 1: 'usp', Argument/Subject 2: 'unite state pharmacopeium'

Answer:
refer to