( ( Each vaccine ) ( ( ( acts differently ) ( on ( the ( immune system ) ) ) ) . ) )
(ROOT (S (NP (DT Each) (NN vaccine)) (VP (VBZ acts) (ADVP (RB differently)) (PP (IN on) (NP (DT the) (JJ immune) (NN system)))) (. .)))
Each vaccine acts differently on the immune system.
(ROOT (S (NP (DT Each) (NN lymph) (NN organ)) (VP (VBZ has) (NP (NP (DT a) (JJ different) (NN job)) (PP (IN in) (NP (DT the) (JJ immune) (NN system))))) (. .)))