sentence: Often , after school , I babysit my parents ' friends ' children and I usually really like it ! I am also a very athletic person , so I would not mind entertaining the children for a longer period of time and also doing some physical exercises .
modified: Often after school I babysit my parents friends ' children and I usually really like it ! I am also a very athletic person so I would not mind entertaining the children for a longer period of time and also doing some physical exercises .
transformation: PUNCT, PUNCT, NOUN:POSS, PUNCT