sentence: Football is a simple sport where the players must kick the ball into the opponents ' goal . In this sport , you principally improve the leg muscles , but all your body moves .
modified: football is a simple sport , where the player must kick the ball in the opponent goal . in this sport , you improve principally the leg muscles but all your body move .
transformation: ORTH, PUNCT, NOUN:NUM, PREP, NOUN:POSS, ORTH, WO, PUNCT, VERB:SVA