( ( ( The ( spinal cord ) ) ( is ( protected ( by ( ( three layers ) ( of tissue ) ) ) ) ) ) ( , ( ( called ( ( ( spinal meninges ) , ) ( that ( surround ( the canal ) ) ) ) ) . ) ) )
(ROOT (SINV (S (NP (DT The) (JJ spinal) (NN cord)) (VP (VBZ is) (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 is 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)))) (. .)))