( They ( ( include ( ( tests ( of ( ( the abilities ) ( of materials ) ) ) ) ( to ( resist ( oxidation ( , ( corrosion ( , ( and rust ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP They)) (VP (VBP include) (S (NP (NP (NNS tests)) (PP (IN of) (NP (NP (DT the) (NNS abilities)) (PP (IN of) (NP (NNS materials)))))) (VP (TO to) (VP (VB resist) (NP (NN oxidation) (, ,) (NN corrosion) (, ,) (CC and) (NN rust)))))) (. .)))
They include tests of the abilities of materials to resist oxidation, corrosion, and rust.
(ROOT (S (NP (NN Platinum) (CC and) (NN gold)) (VP (VBP are) (NP (NP (JJ useful) (NNS materials)) (PP (IN for) (S (VP (VBG constructing) (NP (NP (NNS circuits)) (PP (RB because) (IN of) (NP (PRP$ their) (NN ability) (S (VP (TO to) (VP (VB resist) (NP (NN oxidation))))))))))))) (. .)))