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.

Input: Consider Input: Sentence: 'The astronomer William Herschel discovered Uranus on the 13th of March 1781 .', Argument/Subject 1: 'william herschel', Argument/Subject 2: 'uranus'

Output: discover


Input: Consider Input: Sentence: 'It runs on Microsoft Windows , Apple Mac OS X , and Linux , and is available in several versions .', Argument/Subject 1: 'window', Argument/Subject 2: 'mac'

Output: run on


Input: Consider Input: Sentence: 'Theodosius headed east to Persia , but historians are not sure whether he had been sent there by his father or if he had fled there .', Argument/Subject 1: 'theodosius', Argument/Subject 2: 'persium'


Output: head to