sentence: However , I think that this mode of transport has some disadvantages . For instance , if there are a lot of cars in a small city , pollution will increase and the environment will be damaged .
modified: However , I think that this transport has some disadvantages , for instance : if in a small city there are a lot of cars , the pollution will increase and the environment will be injured .
transformation: OTHER, PUNCT, PUNCT, WO, DET, VERB