sentence: However , a lot of cities have a problem with traffic because of this . The problem is that citizens do n't use public transport , such as buses , taxis , or even the metro .
modified: However , a lot cities have a problem about traffic , cause of this trouble that citizen do n't use public transporte such as autobus , taxi , or even metro .
transformation: PREP, PREP, OTHER, OTHER, OTHER, NOUN:NUM, OTHER, NOUN, NOUN:NUM, DET