You will be given a definition of a task first, then some input of the task.
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.

Sentence: 'The market is expected to expand in China with the growth of the middle class , and since China joined the World Trade Organization , significant progress has been made in the development of the business environment .', Argument/Subject 1: 'china', Argument/Subject 2: 'world trade organization'
Output:
join