Teacher: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.
Teacher: Now, understand the problem? Solve this instance: Sentence: 'Moscow is the capital city of Russia and the country 's economic and cultural center .', Argument/Subject 1: 'moscow', Argument/Subject 2: 'russium'
Student:
be city of