( Collagen ( ( is ( ( the ( supporting structure ) ) ( of ( ( the skin ) ( -LRB- ( ( of ( the ( dermis ( or ( inner layer ) ) ) ) ) -RRB- ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Collagen)) (VP (VBZ is) (NP (NP (DT the) (VBG supporting) (NN structure)) (PP (IN of) (NP (NP (DT the) (NN skin)) (PRN (-LRB- -LRB-) (PP (IN of) (NP (DT the) (JJ dermis) (CC or) (JJ inner) (NN layer))) (-RRB- -RRB-)))))) (. .)))
Collagen is the supporting structure of the skin (of the dermis or inner layer).
(ROOT (S (NP (DT The) (NNS dermis)) (VP (VBZ contains) (NP (NP (JJS most)) (PP (IN of) (NP (NP (DT the) (NNS structures)) (VP (VBN found) (PP (IN in) (NP (NN skin)))))))) (. .)))