( and ( ( ( match ( ( the ( observed speed ) ) ( of ( pressure ( and ( shear ( sound waves ) ) ) ) ) ) ) ( in ( the ( solid ( inner core ) ) ) ) ) . ) )
(ROOT (S (CC and) (VP (VB match) (NP (NP (DT the) (ADJP (JJ observed)) (NN speed)) (PP (IN of) (NP (NN pressure) (CC and) (NN shear) (NN sound) (NNS waves)))) (PP (IN in) (NP (DT the) (JJ solid) (JJ inner) (NN core)))) (. .)))
and match the observed speed of pressure and shear sound waves in the solid inner core.
(ROOT (S (NP (JJ Seismic) (NNS waves)) (VP (VBP prove) (NP (NP (DT the) (JJ inner) (NN core)) (SBAR (S (NP (PRP it)) (VP (VBZ is) (ADJP (JJ solid))))))) (. .)))