Such stitching generally outlasts the fabric of jeans, as one can see from looking at the holey knees of jeans worn by many teenagers.
( ( Such stitching ) ( generally ( ( ( ( outlasts ( ( the fabric ) ( of jeans ) ) ) , ) ( as ( one ( can ( see ( from ( looking ( at ( ( the ( holey knees ) ) ( of ( jeans ( worn ( by ( many teenagers ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (JJ Such) (NN stitching)) (ADVP (RB generally)) (VP (VBZ outlasts) (NP (NP (DT the) (NN fabric)) (PP (IN of) (NP (NNS jeans)))) (, ,) (SBAR (IN as) (S (NP (PRP one)) (VP (MD can) (VP (VB see) (PP (IN from) (S (VP (VBG looking) (PP (IN at) (NP (NP (DT the) (JJ holey) (NNS knees)) (PP (IN of) (NP (NP (NNS jeans)) (VP (VBN worn) (PP (IN by) (NP (JJ many) (NNS teenagers)))))))))))))))) (. .)))
Many teenagers have holes in their jeans.
( ( Many teenagers ) ( ( have ( holes ( in ( their jeans ) ) ) ) . ) )
(ROOT (S (NP (JJ Many) (NNS teenagers)) (VP (VBP have) (NP (NP (NNS holes)) (PP (IN in) (NP (PRP$ their) (NNS jeans))))) (. .)))