( ( A ( disease vector ) ) ( ( is ( ( an agent ) ( that ( ( transfers ( ( a pathogen ) ( from ( one organism ) ) ) ) ( to ( another ( -LRB- ( ( ( e.g. , ) ( an insect ) ) -RRB- ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT A) (NN disease) (NN vector)) (VP (VBZ is) (NP (NP (DT an) (NN agent)) (SBAR (WHNP (WDT that)) (S (VP (VBZ transfers) (NP (NP (DT a) (NN pathogen)) (PP (IN from) (NP (CD one) (NN organism)))) (PP (TO to) (NP (NP (DT another)) (PRN (-LRB- -LRB-) (NP (NNP e.g.)) (, ,) (NP (DT an) (NN insect)) (-RRB- -RRB-))))))))) (. .)))
A disease vector is an agent that transfers a pathogen from one organism to another (e.g., an insect).
(ROOT (S (NP (NP (DT An) (NN organism)) (SBAR (WHNP (WDT that)) (S (VP (VBZ carries) (NP (NNS pathogens)) (PP (IN from) (NP (NP (CD one) (NN individual)) (PP (TO to) (NP (DT another))))))))) (VP (VBZ is) (VP (VBN called) (NP (DT a) (NN vector)))) (. .)))