( ( These mountains ) ( ( are ( some ( of ( ( the ( higher peaks ) ) ( in ( ( this region ) ( of Pennsylvania ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT These) (NNS mountains)) (VP (VBP are) (NP (NP (DT some)) (PP (IN of) (NP (NP (DT the) (JJR higher) (NNS peaks)) (PP (IN in) (NP (NP (DT this) (NN region)) (PP (IN of) (NP (NNP Pennsylvania))))))))) (. .)))
These mountains are some of the higher peaks in this region of Pennsylvania.
(ROOT (S (NP (NNS Scientists)) (VP (VBP know) (SBAR (IN that) (S (NP (DT some) (NNS mountains)) (VP (VBD were) (ADVP (RB once)) (PP (IN at) (NP (NP (DT the) (NN bottom)) (PP (IN of) (NP (DT an) (NN ocean))))) (SBAR (IN because) (S (NP (JJ marine) (NNS fossils)) (VP (VBP have) (VP (VBN been) (VP (VBN found) (PP (IN on) (NP (NP (DT the) (NNS peaks)) (PP (IN of) (NP (DT some) (NNS mountains)))))))))))))) (. .)))