( They ( ( are ( devouring ( ( ( ( ( a ( cactus pad ) ) , ) spines ) and ) all ) ) ) . ) )
(ROOT (S (NP (PRP They)) (VP (VBP are) (VP (VBG devouring) (NP (NP (DT a) (NN cactus) (NN pad)) (, ,) (NP (NNS spines)) (CC and) (NP (DT all))))) (. .)))
They are devouring a cactus pad, spines and all.
(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)))))))))) (. .)))