( ( describe ( ( the methods ) ( of ( internal ( and ( external decontamination ) ) ) ) ) ) ; )
(ROOT (S (VP (VB describe) (NP (NP (DT the) (NNS methods)) (PP (IN of) (NP (JJ internal) (CC and) (JJ external) (NN decontamination))))) (: ;)))
describe the methods of internal and external decontamination;
(ROOT (S (NP (NNS Amphibians)) (ADVP (RB sexually)) (VP (VB reproduce) (PP (IN through) (NP (JJ external) (CC or) (JJ internal) (NN fertilization)))) (. .)))