( ( ( The ( outer surface ) ) ( of ( the cornea ) ) ) ( ( is ( covered ( with ( fast-growing ( , ( ( easily regenerated ) ( epithelial cells ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ outer) (NN surface)) (PP (IN of) (NP (DT the) (NN cornea)))) (VP (VBZ is) (VP (VBN covered) (PP (IN with) (NP (JJ fast-growing) (, ,) (ADJP (RB easily) (JJ regenerated)) (JJ epithelial) (NNS cells))))) (. .)))
The outer surface of the cornea is covered with fast-growing, easily regenerated epithelial cells.
(ROOT (S (NP (NNP Epithelial) (. ?) (NNP tissue)) (VP (VBZ consists) (PP (IN of) (NP (NP (NNS cells)) (SBAR (WHNP (WHNP (WDT that) (NN cover)) (NP (JJ inner) (CC and) (JJ outer) (NN body))) (S (VP (VBZ surfaces))))))) (. .)))