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: 'In the event of the absence of the Treasurer , the Assistant Treasurer shall assume the duties of the Treasurer .', Argument/Subject 1: 'assistant treasurer', Argument/Subject 2: 'treasurer'
[EX A]: assume duty of

[EX Q]: Sentence: 'A short time after the NFL banned Ephedra , also known by the Chinese been using EPHEDRA because EPHEDRA killed my houghton and I find them kind of headlines .', Argument/Subject 1: 'ephedron', Argument/Subject 2: 'nfl'
[EX A]: be ban by

[EX Q]: Sentence: 'In addition to Japan 's three major cities of Tokyo , Osaka and Nagoya , 15 other regional cities are served by rail-based transit systems such as monorails , subways and AGTs .', Argument/Subject 1: 'osaka', Argument/Subject 2: 'japan'
[EX A]:
be city in