( ( ( Crest ( The point ) ) ( of ( ( maximum ( positive displacement ) ) ( on ( a ( transverse wave ) ) ) ) ) ) ( ( is ( called ( a crest ) ) ) . ) )
(ROOT (S (NP (NP (NP (NNP Crest)) (NP (DT The) (NN point))) (PP (IN of) (NP (NP (JJ maximum) (JJ positive) (NN displacement)) (PP (IN on) (NP (DT a) (JJ transverse) (NN wave)))))) (VP (VBZ is) (VP (VBN called) (NP (DT a) (NN crest)))) (. .)))
Crest The point of maximum positive displacement on a transverse wave is called a crest.
(ROOT (S (NP (NP (DT The) (JJ high) (NNS points)) (PP (IN in) (NP (DT a) (JJ transverse) (NN wave)))) (VP (VBP are) (VP (VBN called) (NP (NNS crests)))) (. .)))