sentence: Those people who have mental or other serious illnesses are n't allowed or are not able to drive a car . For them , the public transport system is necessary .
modified: Those people who has mental or other serious illness does n't allowed or not able to drive a car , for them public transport system is necessary .
transformation: VERB:SVA, NOUN:NUM, VERB:TENSE, VERB, PUNCT, PUNCT, DET