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: 'It was in 1909 that William Howard Taft became the 27th president of the United States .', Argument/Subject 1: 'william howard taft', Argument/Subject 2: 'unite state'

Output: be president of


Input: Consider Input: Sentence: 'The election of Illinois Senator Barack Obama as America 's 44th president is astounding , historical , implausible , improbable and completely without precedent in the history of the United States .', Argument/Subject 1: 'obama', Argument/Subject 2: 'america'

Output: be president of


Input: Consider Input: Sentence: 'PPO freight stands for januvia Preferred Provider Organization .', Argument/Subject 1: 'ppo', Argument/Subject 2: 'prefer provider organization'


Output: stand for