( ( The ( inflammatory reaction ) ) ( ( is ( ( a ( host ( defense response ) ) ) ( that ( ( protects us ) ( from ( invading microorganisms ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ inflammatory) (NN reaction)) (VP (VBZ is) (NP (NP (DT a) (NN host) (NN defense) (NN response)) (SBAR (WHNP (WDT that)) (S (VP (VBZ protects) (NP (PRP us)) (PP (IN from) (S (VP (VBG invading) (NP (NNS microorganisms)))))))))) (. .)))
The inflammatory reaction is a host defense response that protects us from invading microorganisms.
(ROOT (S (NP (JJ Inflammatory) (NN response)) (VP (VBZ is) (NP (NP (DT the) (JJ second) (NN line)) (PP (IN of) (NP (NN defense))))) (. .)))