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.

Example Input: Sentence: 'Greensboro is served by the Piedmont Triad International Airport .', Argument/Subject 1: 'greensboro', Argument/Subject 2: 'piedmont triad international airport'
Example Output: be serve by

Example Input: Sentence: 'Prague is the capital city of the Czech Republic , and a great place for tax free shopping .', Argument/Subject 1: 'prague', Argument/Subject 2: 'czech republic'
Example Output: be capital city of

Example Input: Sentence: 'It backfired on the Commissioner , though , when both Benoit & Jericho snapped , pounding on him and locking on the Crippler Crossface and the Walls of Jericho at the same time .', Argument/Subject 1: 'jericho', Argument/Subject 2: 'wall of jericho'
Example Output:
lock on