( Skin ( ( cactus ( to ( remove spines ) ) ) . ) )
(ROOT (S (NP (NNP Skin)) (VP (VBZ cactus) (S (VP (TO to) (VP (VB remove) (NP (NNS spines)))))) (. .)))
Skin cactus to remove spines.
(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)))))))))) (. .)))