sentence: The Doctor is an alien from the planet Gallifrey and he travels in all of time and space with his companions , who are normally humans . In his experiences he saved whole planets from other bad aliens .
modified: the Doctor is an alien from the planet Gallifrey and he travels in all of time and space with his companions that are normally humans . in his experiences he saved whole planets to other bad aliens .
transformation: ORTH, PUNCT, PRON, ORTH, PREP