( Vectors ( ( are ( organisms ( which ( ( ( ( transport pathogens ) ( from ( ( one ( person ( -LRB- ( or ( animal -RRB- ) ) ) ) ) ( to another ) ) ) ) and ) ( also ( ( provide ( within themselves ) ) ( ( an environment ) ( for ( the ( pathogen ( to ( complete ( part ( of ( its life-cycle ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Vectors)) (VP (VBP are) (NP (NP (NNS organisms)) (SBAR (WHNP (WDT which)) (S (VP (VP (VB transport) (NP (NNS pathogens)) (PP (IN from) (NP (NP (CD one) (NN person) (PRN (-LRB- -LRB-) (CC or) (ADJP (JJ animal)) (-RRB- -RRB-))) (PP (TO to) (NP (DT another)))))) (CC and) (VP (ADVP (RB also)) (VB provide) (PP (IN within) (NP (PRP themselves))) (NP (NP (DT an) (NN environment)) (PP (IN for) (NP (DT the) (NN pathogen) (S (VP (TO to) (VP (VB complete) (NP (NP (NN part)) (PP (IN of) (NP (PRP$ its) (NN life-cycle)))))))))))))))) (. .)))
Vectors are organisms which transport pathogens from one person (or animal) to another and also provide within themselves an environment for the pathogen to complete part of its life-cycle.
(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)))) (. .)))