( ( Her skin ) ( ( was ( ( cover ( by ( ( a layer ) ( of ( mucus ( about ( a foot ) ) ) ) ) ) ) thick ) ) . ) )
(ROOT (S (NP (PRP$ Her) (NN skin)) (VP (VBD was) (S (VP (VB cover) (PP (IN by) (NP (NP (DT a) (NN layer)) (PP (IN of) (NP (NP (NNS mucus)) (PP (IN about) (NP (DT a) (NN foot))))))) (ADVP (JJ thick))))) (. .)))
Her skin was cover by a layer of mucus about a foot thick.
(ROOT (S (NP (NP (DT The) (JJ thick) (NN skin)) (, ,) (VP (VBN found) (ADVP (RB only)) (PP (IN on) (NP (NP (NP (DT the) (NNS palms)) (PP (IN of) (NP (DT the) (NNS hands)))) (CC and) (NP (NP (DT the) (NNS soles)) (PP (IN of) (NP (DT the) (NNS feet))))))) (, ,)) (VP (VBZ has) (NP (DT an) (JJ extra) (NN layer))) (. .)))