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.
--------
Question: Sentence: 'Nazi Germany 's attack on the Soviet Union in June 1941 extended the zone of killing operations even farther east .', Argument/Subject 1: 'germany', Argument/Subject 2: 'soviet union'

Answer: attack


Question: 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'

Answer: be capital of


Question: Sentence: 'The elected officers of the Society shall be a President , a Vice-President , a Secretary and a Treasurer .', Argument/Subject 1: 'president', Argument/Subject 2: 'society'

Answer:
be officer of