( ( The meninges ) ( ( are ( ( ( three ( thin layers ) ) ( of membrane ) ) ( that ( cover ( ( ( the brain ) and ) ( spinal cord ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNS meninges)) (VP (VBP are) (NP (NP (CD three) (JJ thin) (NNS layers)) (PP (IN of) (NP (NNP membrane))) (SBAR (WHNP (WDT that)) (S (VP (VBP cover) (NP (NP (DT the) (NN brain)) (CC and) (NP (JJ spinal) (NN cord)))))))) (. .)))
The meninges are three thin layers of membrane that cover the brain and spinal cord.
(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)))) (. .)))