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: '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'
Example Output: be son of

Example Input: Sentence: 'He also said that a nuclear-armed Iran would be a threat to both Israel and the United States .', Argument/Subject 1: 'israel', Argument/Subject 2: 'iran'
Example Output: be threat to

Example Input: Sentence: 'When Texas joined the Union the first time , a clause was included that allowed the state to secede at any time , but since it joined the Confederacy during the Civil War and was defeated it is considered conquered territory and lost its right to secede .', Argument/Subject 1: 'texa', Argument/Subject 2: 'union'
Example Output:
join