( ( ( ( ( Three ( thin membranes ) ) , ) ( called meninges ) ) , ) ( ( cover ( ( ( ( the ( entire brain ) ) and ) ( spinal cord ) ) ( forming ( a ( thin ( protective layer ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (CD Three) (JJ thin) (NNS membranes)) (, ,) (VP (VBN called) (NP (NNS meninges))) (, ,)) (VP (VBP cover) (S (NP (NP (DT the) (JJ entire) (NN brain)) (CC and) (NP (JJ spinal) (NN cord))) (VP (VBG forming) (NP (DT a) (JJ thin) (JJ protective) (NN layer))))) (. .)))
Three thin membranes, called meninges, cover the entire brain and spinal cord forming a thin protective layer.
(ROOT (S (NP (NP (DT The) (CD three) (NNS layers)) (PP (IN of) (NP (NP (JJ protective) (NNS coverings)) (PP (IN of) (NP (DT the) (JJ spinal) (NN cord)))))) (VP (VBZ is) (VP (VBN called) (NP (DT the) (NNS meninges)))) (. .)))