( Cactus ( ( spine injuries ) . ) )
(ROOT (S (NP (NNS Cactus)) (VP (VBZ spine) (NP (NNS injuries))) (. .)))
Cactus spine injuries.
(ROOT (S (NP (NP (DT The) (NNS spines)) (PP (IN of) (NP (DT a) (NN cactus)))) (VP (VBP help) (SBAR (S (NP (PRP it)) (VP (VBP survive) (SBAR (IN because) (S (NP (NNS spines)) (VP (VB protect) (NP (DT the) (NN cactus)) (PP (IN from) (NP (NNS animals)))))))))) (. .)))