For centuries, the Loire river was a vital highway between the Atlantic and the heart of France.
( ( For centuries ) ( , ( ( the ( Loire river ) ) ( ( was ( ( ( ( a ( vital highway ) ) ( between ( the Atlantic ) ) ) and ) ( ( the heart ) ( of France ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN For) (NP (NNS centuries))) (, ,) (NP (DT the) (NNP Loire) (NN river)) (VP (VBD was) (NP (NP (NP (DT a) (JJ vital) (NN highway)) (PP (IN between) (NP (DT the) (NNP Atlantic)))) (CC and) (NP (NP (DT the) (NN heart)) (PP (IN of) (NP (NNP France)))))) (. .)))
The Loire stopped being a vital highway shortly after the revolution.
( ( The Loire ) ( ( stopped ( being ( ( a ( vital highway ) ) ( shortly ( after ( the revolution ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNP Loire)) (VP (VBD stopped) (S (VP (VBG being) (NP (NP (DT a) (JJ vital) (NN highway)) (PP (RB shortly) (IN after) (NP (DT the) (NN revolution))))))) (. .)))