( is ( ( the velocity ) ( of ( ( ( the object ) , ) and ) ) ) )
(ROOT (SINV (VBZ is) (NP (NP (DT the) (NN velocity)) (PP (IN of) (NP (NP (DT the) (NN object)) (, ,) (NP (NNP and)))))))
is the velocity of the object, and
(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))))) (. .)))