( ( Mechanical waves ) ( ( are ( waves ( which ( ( require ( a medium ) ) ( ( in order ) ( to ( ( transport ( their energy ) ) ( from ( ( one location ) ( to another ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Mechanical) (NNS waves)) (VP (VBP are) (NP (NP (NNS waves)) (SBAR (WHNP (WDT which)) (S (VP (VBP require) (NP (DT a) (NN medium)) (SBAR (IN in) (NN order) (S (VP (TO to) (VP (VB transport) (NP (PRP$ their) (NN energy)) (PP (IN from) (NP (NP (CD one) (NN location)) (PP (TO to) (NP (DT another)))))))))))))) (. .)))
Mechanical waves are waves which require a medium in order to transport their energy from one location to another.
(ROOT (S (NP (JJ Mechanical) (NNS waves)) (VP (VBP require) (NP (NP (DT a) (NN material) (NN medium)) (PP (JJ such) (IN as) (NP (NP (NN water)) (, ,) (NP (NN air)) (, ,) (CC or) (NP (NN rope)))))) (. .)))