( ( ( The ( normal result ) ) ( of ( grinding ( a ( ( mirror or ) lens ) ) ) ) ) ( ( will ( be ( a ( spherical surface ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ normal) (NN result)) (PP (IN of) (S (VP (VBG grinding) (NP (DT a) (NN mirror) (CC or) (NN lens)))))) (VP (MD will) (VP (VB be) (NP (DT a) (JJ spherical) (NN surface)))) (. .)))
The normal result of grinding a mirror or lens will be a spherical surface.
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (DT the) (NN water)) (VP (VBP vapor) (PP (IN from) (NP (DT a) (JJ hot) (NN shower) (NNS contacts))) (NP (NP (DT the) (JJR cooler) (NN surface)) (PP (IN of) (NP (DT a) (NN mirror))))))) (, ,) (NP (DT the) (NN result)) (VP (VBZ is) (SBAR (IN that) (S (NP (NNP foggy)) (VP (VBP mirror))))) (. .)))