( ( ( ( ( ( INNATE ( IMMUNE SYSTEM ) ) ( ( ( The ( body 's ) ) ( first line ) ) ( of defense ) ) ) , ) ( ( the cells ) ( of ( the ( innate ( immune system ) ) ) ) ) ) , ) ( ( are ( ( primitive ( foot soldiers ) ) ( that ( kill ( by ( ( ( eating invaders ) or ) ( ( squirting them ) ( with poison ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NP (NNP INNATE) (NNP IMMUNE) (NNP SYSTEM)) (NP (NP (NP (DT The) (NN body) (POS 's)) (JJ first) (NN line)) (PP (IN of) (NP (NN defense))))) (, ,) (NP (NP (DT the) (NNS cells)) (PP (IN of) (NP (DT the) (JJ innate) (JJ immune) (NN system)))) (, ,)) (VP (VBP are) (NP (NP (JJ primitive) (NN foot) (NNS soldiers)) (SBAR (WHNP (WDT that)) (S (VP (VBP kill) (PP (IN by) (S (VP (VP (VBG eating) (NP (NNS invaders))) (CC or) (VP (VBG squirting) (NP (PRP them)) (PP (IN with) (NP (NN poison)))))))))))) (. .)))
INNATE IMMUNE SYSTEM The body's first line of defense, the cells of the innate immune system, are primitive foot soldiers that kill by eating invaders or squirting them with poison.
(ROOT (S (NP (DT The) (JJ innate) (JJ immune) (NN system)) (VP (VBZ serves) (PP (IN as) (NP (NP (DT a) (JJ first) (NN responder)) (PP (TO to) (NP (NP (JJ pathogenic) (NNS threats)) (SBAR (WHNP (WDT that)) (S (VP (VB bypass) (NP (NP (JJ natural) (ADJP (NN physical) (CC and) (NN chemical)) (NNS barriers)) (PP (IN of) (NP (DT the) (NN body)))))))))))) (. .)))