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.

Ex Input:
Sentence: 'London is both the capital of England and the United Kingdom and it serves as the headquarters for the Royal Family .', Argument/Subject 1: 'london', Argument/Subject 2: 'england'

Ex Output:
be capital of


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

Ex Output:
be serve by


Ex Input:
Sentence: '7. But when the king--the Great God , who is the Father of our Lord Jesus Christ .', Argument/Subject 1: 'god', Argument/Subject 2: 'christ'

Ex Output:

be father of