sentence: On the other hand , the expansion of a city increases pollution and all kinds of garbage . The air pollution is much more serious now , and seeing blue sky is almost impossible in some big cities .
modified: On the other hand , the expansion of city increase pollution of all kinds of garbage . The air pollution is much more serious now , and watching the blue sky is almost impossible in some big cities .
transformation: DET, VERB:SVA, OTHER, VERB, DET