( ( ( This type ) ( of energy ) ) ( ( is ( ( a form ) ( of ( mechanical energy ) ) ) ) . ) )
(ROOT (S (NP (NP (DT This) (NN type)) (PP (IN of) (NP (NN energy)))) (VP (VBZ is) (NP (NP (DT a) (NN form)) (PP (IN of) (NP (JJ mechanical) (NN energy))))) (. .)))
This type of energy is a form of mechanical energy .
(ROOT (S (NP (DT A) (NN person)) (VP (VBZ uses) (NP (JJ mechanical) (NN energy) (S (VP (TO to) (VP (VB pedal) (NP (DT a) (NN bicycle))))))) (. .)))