( ( Injectable vaccines ) ( often ( ( produce ( lesions ( in ( animals ( at ( ( the site ) ( of ( the injection ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (JJ Injectable) (NNS vaccines)) (ADVP (RB often)) (VP (VBP produce) (NP (NP (NNS lesions)) (PP (IN in) (NP (NP (NNS animals)) (PP (IN at) (NP (NP (DT the) (NN site)) (PP (IN of) (NP (DT the) (NN injection))))))))) (. .)))
Injectable vaccines often produce lesions in animals at the site of the injection.
(ROOT (S (NP (NNP Vaccine)) (VP (VBZ is) (NP (NP (DT a) (JJ preventative) (NN measure)) (SBAR (WHNP (WDT that)) (S (VP (VBZ is) (ADVP (RB often)) (VP (VBN delivered) (PP (IN by) (NP (NN injection))) (PP (IN into) (NP (DT the) (NN arm))))))))) (. .)))