( It ( ( is ( ( ( ( ( ( ( a ( thick layer ) ) ( of ( old ( dead sole ) ) ) ) , ) ( retained ( in ( the foot ) ) ) ) but ) actually ) ( ( a ( seperate layer ) ) ( from ( the ( real ( live ( sole ( lurking beneath ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ is) (NP (NP (NP (DT a) (JJ thick) (NN layer)) (PP (IN of) (NP (JJ old) (JJ dead) (NN sole))) (, ,) (VP (VBN retained) (PP (IN in) (NP (DT the) (NN foot))))) (CC but) (RB actually) (NP (NP (DT a) (JJ seperate) (NN layer)) (PP (IN from) (NP (DT the) (JJ real) (JJ live) (JJ sole) (VBG lurking) (NN beneath)))))) (. .)))
It is a thick layer of old dead sole, retained in the foot but actually a seperate layer from the real live sole lurking beneath.
(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))) (. .)))