( ( The ( killed ( injectable vaccine ) ) ) ( often ( ( comes ( as ( a ( combination product ) ) ) ) . ) ) )
(ROOT (S (NP (DT The) (JJ killed) (NN injectable) (NN vaccine)) (ADVP (RB often)) (VP (VBZ comes) (PP (IN as) (NP (DT a) (NN combination) (NN product)))) (. .)))
The killed injectable vaccine often comes as a combination product.
(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))))))))) (. .)))