sentence: Public transport is the obvious solution to the increase in the population . If it is made cheap for commuters , clean , easy and efficient , then it could take the strain off of the overloaded British roads .
modified: Public transport is the obvious solution to to the increase in population if it is made cheep to commuters , clean , easy and efficient then it could take the strain of the overloaded British roads .
transformation: PART, DET, PUNCT, OTHER, PREP, PUNCT, PREP