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: 'Postnova first was based in an office in Munich downtown in the state of Bavaria in Germany .', Argument/Subject 1: 'bavarium', Argument/Subject 2: 'germany'

Ex Output:
be state in

Ex Input:
Sentence: 'Anteros is the twin brother of Eros .', Argument/Subject 1: 'antero', Argument/Subject 2: 'ero'

Ex Output:
be brother of

Ex Input:
Sentence: 'The city of Rio de Janeiro is a major cultural and economic hub of Brazil .', Argument/Subject 1: 'rio', Argument/Subject 2: 'brazil'

Ex Output:
be city in