( Radiotherapy ( ( ( ( ( may ( affect ( ( the ( connective tissue ) ) ( surrounding nerves ) ) ) ) , ) and ) ( may ( ( ( damage or ) kill ) ( ( ( ( white or ) gray ) matter ) ( in ( ( ( the brain ) or ) ( spinal cord ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Radiotherapy)) (VP (VP (MD may) (VP (VB affect) (NP (NP (DT the) (JJ connective) (NN tissue)) (VP (VBG surrounding) (NP (NNS nerves)))))) (, ,) (CC and) (VP (MD may) (VP (VB damage) (CC or) (VB kill) (NP (NP (ADJP (JJ white) (CC or) (JJ gray)) (NN matter)) (PP (IN in) (NP (NP (DT the) (NN brain)) (CC or) (NP (JJ spinal) (NN cord)))))))) (. .)))
Radiotherapy may affect the connective tissue surrounding nerves, and may damage or kill white or gray matter in the brain or spinal cord.
(ROOT (S (NP (NP (JJS Most)) (PP (IN of) (NP (DT the) (JJ gray) (NN matter)))) (VP (VBZ is) (PP (IN on) (NP (NP (DT the) (NN surface)) (PP (IN of) (NP (DT the) (NN brain))))) (, ,) (S (VP (VBG surrounding) (NP (JJ white) (NN matter))))) (. .)))