It is constrained by laws and regulations formulated by Congress over more than two centuries.
( It ( ( is ( constrained ( by ( ( ( laws and ) regulations ) ( formulated ( by ( Congress ( over ( ( more ( than two ) ) centuries ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ is) (VP (VBN constrained) (PP (IN by) (NP (NP (NNS laws) (CC and) (NNS regulations)) (VP (VBN formulated) (PP (IN by) (NP (NP (NNP Congress)) (PP (IN over) (NP (QP (JJR more) (IN than) (CD two)) (NNS centuries)))))))))) (. .)))
The regulations were created over the course of more than two hundred years.
( ( The regulations ) ( ( were ( created ( over ( ( the course ) ( of ( ( more ( ( than two ) hundred ) ) years ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNS regulations)) (VP (VBD were) (VP (VBN created) (PP (IN over) (NP (NP (DT the) (NN course)) (PP (IN of) (NP (QP (JJR more) (IN than) (CD two) (CD hundred)) (NNS years))))))) (. .)))