( ( The notochord ) ( ( ( should not ) ( be ( confused ( with ( ( the ( backbone ( or ( vertebral column ) ) ) ) ( of ( most ( adult vertebrates ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN notochord)) (VP (MD should) (RB not) (VP (VB be) (VP (VBN confused) (PP (IN with) (NP (NP (DT the) (NN backbone) (CC or) (NN vertebral) (NN column)) (PP (IN of) (NP (JJS most) (JJ adult) (NNS vertebrates)))))))) (. .)))
The notochord should not be confused with the backbone or vertebral column of most adult vertebrates.
(ROOT (S (NP (NNP Backbone)) (VP (VBZ is) (NP (NP (DT another) (NN name)) (PP (IN for) (NP (DT the) (JJ vertebral) (NN column))))) (. .)))
Backbone is another name for the vertebral column.