Q: 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: 'Osaka has always been the commercial capital of Japan , and the rice merchants there developed sushi that consisted primarily of seasoned rice mixed with other ingredients and formed into decorative , edible packages .', Argument/Subject 1: 'osaka', Argument/Subject 2: 'japan'
A:
be capital of