( ( A weed ) ( ( is ( defined ( as ( ( any plant ) ( growing ( where ( it ( ( is not ) wanted ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT A) (NN weed)) (VP (VBZ is) (VP (VBN defined) (PP (IN as) (NP (NP (DT any) (NN plant)) (VP (VBG growing) (SBAR (WHADVP (WRB where)) (S (NP (PRP it)) (VP (VBZ is) (RB not) (VP (VBN wanted)))))))))) (. .)))
A weed is defined as any plant growing where it is not wanted.
(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)))) (. .)))