( ( energy ( of ( ( activation ( The ( minimum amount ) ) ) ( of ( energy ( required ( for ( a ( given ( reaction ( to occur ) ) ) ) ) ) ) ) ) ) ) ; )
(ROOT (NP (NP (NP (NN energy)) (PP (IN of) (NP (NP (JJ activation) (DT The) (JJ minimum) (NN amount)) (PP (IN of) (NP (NP (NN energy)) (VP (VBN required) (PP (IN for) (NP (DT a) (VBN given) (NN reaction) (S (VP (TO to) (VP (VB occur)))))))))))) (: ;)))
energy of activation The minimum amount of energy required for a given reaction to occur;
(ROOT (S (NP (NP (DT The) (NN amount)) (PP (IN of) (NP (NP (NN energy)) (VP (VBN required) (S (VP (TO to) (VP (VB begin) (NP (DT a) (JJ chemical) (NN reaction))))))))) (VP (VBZ is) (VP (VBN known) (PP (IN as) (NP (DT the) (NN activation) (NN energy))))) (. .)))