( We ( ( ( ( ( study ( ( ( ( ( ( the specificity ) , ) ( effector function ) ) , ) and ) ( ( lymphokine secretion ) ( of ( T-cell clones ) ) ) ) ) ( from ( ( ( ( sporozoite-immunized ( human volunteers ) ) , ) ( as ( well as ) ) ) ( ( ( primate and ) rodent ) hosts ) ) ) ) , ) ( to ( ( ( determine ( their role ) ) ( in ( the ( immune response ) ) ) ) ( to ( ( the ( malaria ( parasite 's ) ) ) ( pre-erythrocytic stages ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP We)) (VP (VBP study) (NP (NP (DT the) (NN specificity)) (, ,) (NP (NN effector) (NN function)) (, ,) (CC and) (NP (NP (JJ lymphokine) (NN secretion)) (PP (IN of) (NP (JJ T-cell) (NNS clones))))) (PP (IN from) (NP (NP (JJ sporozoite-immunized) (JJ human) (NNS volunteers)) (, ,) (CONJP (RB as) (RB well) (IN as)) (NP (ADJP (JJ primate) (CC and) (JJ rodent)) (NNS hosts)))) (, ,) (S (VP (TO to) (VP (VB determine) (NP (PRP$ their) (NN role)) (PP (IN in) (NP (DT the) (JJ immune) (NN response))) (PP (TO to) (NP (NP (DT the) (NN malaria) (NN parasite) (POS 's)) (JJ pre-erythrocytic) (NNS stages))))))) (. .)))
We study the specificity, effector function, and lymphokine secretion of T-cell clones from sporozoite-immunized human volunteers, as well as primate and rodent hosts, to determine their role in the immune response to the malaria parasite's pre-erythrocytic stages.
(ROOT (S (NP (NNS Sporozoites)) (VP (VBP are) (NP (NP (DT the) (NNS cells)) (VP (VBN caused) (SBAR (IN that) (S (NP (NNS parasites)) (VP (VBD spread) (PP (IN through) (NP (PRP$ their) (NN host))))))))) (. .)))