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.

[Q]: Sentence: 'Not only for the twin towers fentanyl ZOLPIDEM may cause Restless Leg Syndrome and nighttime grinding of teeth .', Argument/Subject 1: 'zolpidem', Argument/Subject 2: 'restless leg syndrome'
[A]: cause

[Q]: Sentence: 'Just as the Second Psalm contains the great prophetic proclamation of Christ as God 's Son , so the first reference in all the Bible to anyone as God 's Son is found in the Second Book , as quoted above .', Argument/Subject 1: 'christ', Argument/Subject 2: 'god'
[A]: be son of

[Q]: Sentence: 'The current President of the United States is George W. Bush .', Argument/Subject 1: 'george w bush', Argument/Subject 2: 'unite state'
[A]:
be president of