sentence: The Science teacher explained to Tom all the problems that global warming would cause and he proposed to Tom to do a campaign to raise awareness about the use of cars and the problems it would cause in the future .
modified: The Science teacher explained to Tom all the problems that would provoke the global warming an he propose to Tom to do a campaign to raise about the use of the cars and the problems that would cause on a future .
transformation: OTHER, OTHER, VERB:TENSE, NOUN, DET, PRON, PREP, DET