( ( 30 ( approaching ( instantaneous ( velocity 1C10 ) ) ) ) . )
(ROOT (NP (NP (CD 30)) (VP (VBG approaching) (NP (NN instantaneous) (NN velocity) (CD 1C10))) (. .)))
30 approaching instantaneous velocity 1C10.
(ROOT (S (NP (JJ Instantaneous) (NN velocity)) (VP (VBZ is) (VP (VBN defined) (PP (IN as) (NP (NP (DT the) (NN velocity)) (PP (IN of) (NP (DT the) (NN object))))) (PP (IN at) (NP (DT a) (VBN given) (NN moment))))) (. .)))