sentence: People start to play football on a regular pitch . After some time , they will be tired , but it is normal because their muscles are not strong enough for running around the pitch many times .
modified: The people start to play football in a regulatory pitch , after some time they will be tired , but it is normal because their muscles are not enough strong for running around the pitch for many times .
transformation: DET, PREP, ADJ, PUNCT, PUNCT, WO, PREP