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: 'In China and other parts of Asia , for example , many small-scale farming operations are intensifying as land and water resources become increasingly scarce and valuable .', Argument/Subject 1: 'china', Argument/Subject 2: 'asia'
be part of

Sentence: 'Paper presented at the meeting of the American Sociological Association , Chicago , IL.', Argument/Subject 1: 'paper', Argument/Subject 2: 'american sociological association'
present at

Sentence: 'New TechCrunch co-editor Erick Schonfeld posted a short article yesterday .', Argument/Subject 1: 'erick schonfeld', Argument/Subject 2: 'techcrunch'

be co-editor of