( ( ( ( ( ( ( The ( spinal cord ) ) -LRB- ) and ) brain ) -RRB- ) ( are ( protected ( by ( ( three layers ) ( of tissue ) ) ) ) ) ) ( , ( ( called ( ( ( spinal meninges ) , ) ( that ( surround ( the canal ) ) ) ) ) . ) ) )
(ROOT (SINV (S (NP (NP (DT The) (JJ spinal) (NN cord)) (-LRB- -LRB-) (CC and) (NP (NN brain)) (-RRB- -RRB-)) (VP (VBP are) (VP (VBN protected) (PP (IN by) (NP (NP (CD three) (NNS layers)) (PP (IN of) (NP (NN tissue)))))))) (, ,) (VP (VBD called)) (NP (NP (JJ spinal) (NNS meninges)) (, ,) (SBAR (WHNP (WDT that)) (S (VP (VBP surround) (NP (DT the) (NN canal)))))) (. .)))
The spinal cord (and brain) are protected by three layers of tissue, called spinal meninges, that surround the canal.
(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)))) (. .)))