( ( KINDS ( OF ( WEEDS ( ( A weed ) ( is ( ( any plant ) ( that ( grows ( where ( it ( is n't ) ) ) ) ) ) ) ) ) ) ) ( ( ( ( wanted , ) or ) ( is ( unwanted ( because ( of ( certain ( undesirable characteristics ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNS KINDS)) (PP (IN OF) (NP (NP (NNS WEEDS)) (SBAR (S (NP (DT A) (NN weed)) (VP (VBZ is) (NP (NP (DT any) (NN plant)) (SBAR (WHNP (WDT that)) (S (VP (VBZ grows) (SBAR (WHADVP (WRB where)) (S (NP (PRP it)) (VP (VBZ is) (RB n't)))))))))))))) (VP (VP (VBD wanted)) (, ,) (CC or) (VP (VBZ is) (NP (NP (JJ unwanted)) (PP (RB because) (IN of) (NP (JJ certain) (JJ undesirable) (NNS characteristics)))))) (. .)))
KINDS OF WEEDS A weed is any plant that grows where it isn't wanted, or is unwanted because of certain undesirable characteristics.
(ROOT (S (NP (NP (NNS Plants)) (SBAR (WHNP (WDT that)) (S (VP (VBP grow) (SBAR (WHADVP (WRB where)) (S (NP (PRP you)) (VP (VBP do) (RB n't) (VP (VB want) (NP (PRP them)))))))))) (VP (VBP are) (VP (VBN called) (NP (NNS weeds)))) (. .)))