This data is used to model the behavior of access costs.
( ( This data ) ( ( is ( used ( to ( model ( ( the behavior ) ( of ( access costs ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT This) (NNS data)) (VP (VBZ is) (VP (VBN used) (S (VP (TO to) (VP (VB model) (NP (NP (DT the) (NN behavior)) (PP (IN of) (NP (NN access) (NNS costs))))))))) (. .)))
This data isn't used to model the behavior of access costs.
( ( This data ) ( ( ( is n't ) ( used ( to ( model ( ( the behavior ) ( of ( access costs ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT This) (NNS data)) (VP (VBZ is) (RB n't) (VP (VBN used) (S (VP (TO to) (VP (VB model) (NP (NP (DT the) (NN behavior)) (PP (IN of) (NP (NN access) (NNS costs))))))))) (. .)))