( ( ( ( Weeds , ) ( for ( purposes ( of ( our discussion ) ) ) ) ) , ) ( ( can ( be ( simply ( ( defined ( as plants ) ) ( growing ( where ( they ( ( are not ) desired ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNS Weeds)) (, ,) (PP (IN for) (NP (NP (NNS purposes)) (PP (IN of) (NP (PRP$ our) (NN discussion))))) (, ,)) (VP (MD can) (VP (VB be) (VP (ADVP (RB simply)) (VBN defined) (PP (IN as) (NP (NNS plants))) (S (VP (VBG growing) (SBAR (WHADVP (WRB where)) (S (NP (PRP they)) (VP (VBP are) (RB not) (ADJP (JJ desired)))))))))) (. .)))
Weeds, for purposes of our discussion, can be simply defined as plants growing where they are not desired.
(ROOT (S (NP (NNS Weeds)) (VP (VBP are) (NP (NP (NNS plants)) (SBAR (WHNP (WDT that)) (S (VP (VP (VBP grow) (SBAR (WHADVP (WRB where)) (S (NP (NNS people)) (VP (VBP do) (RB n't) (VP (VB want) (NP (PRP them)) (PP (TO to))))))) (CC and) (VP (MD can) (VP (VB take) (PRT (RP up)) (NP (NP (NN space) (CC and) (NN use) (NNS resources)) (SBAR (WHNP (WDT which)) (S (VP (VBZ hinders) (NP (NP (NN growth)) (PP (IN of) (NP (ADJP (RBR more) (JJ desirable)) (NNS plants))))))))))))))) (. .)))