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.

[Q]: 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'
[A]: attack


[Q]: Sentence: 'Alex turned to Jack .', Argument/Subject 1: 'alex', Argument/Subject 2: 'jack'
[A]: turn to


[Q]: Sentence: 'Spanish is the official language of Costa Rica .', Argument/Subject 1: 'spanish', Argument/Subject 2: 'costa rica'
[A]:
be language of