( ( Noxious weeds ) ( ( can ( ( ( be annuals ) , ) ( ( ( ( completing ( their ( life cycle ) ) ) ( in ( ( ( ( one ( growing season ) ) , ) or ) perennials ) ) ) , ) ( having ( ( a ( life cycle ) ) ( ( spanning ( more ( than one ) ) ) ( growing season ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Noxious) (NNS weeds)) (VP (MD can) (VP (VB be) (ADJP (JJ annuals)) (, ,) (S (VP (VP (VBG completing) (NP (PRP$ their) (NN life) (NN cycle)) (PP (IN in) (NP (NP (CD one) (VBG growing) (NN season)) (, ,) (CC or) (NP (NNS perennials))))) (, ,) (VP (VBG having) (NP (NP (DT a) (NN life) (NN cycle)) (VP (VBG spanning) (NP (QP (JJR more) (IN than) (CD one))) (NP (JJ growing) (NN season))))))))) (. .)))
Noxious weeds can be annuals, completing their life cycle in one growing season, or perennials, having a life cycle spanning more than one growing season.
(ROOT (S (NP (NNP Life) (NN cycle)) (VP (VBZ is) (NP (NP (DT the) (NN term)) (PP (IN for) (NP (NP (DT the) (NN span)) (PP (IN in) (NP (NP (DT the) (NN life)) (PP (IN of) (NP (NP (DT an) (NN organism)) (PP (IN from) (NP (NP (CD one) (NN generation)) (PP (TO to) (NP (DT the) (JJ next))))))))))))) (. .)))