( ( ( The ( ( most basic ) definition ) ) ( of ( a weed ) ) ) ( ( is ( ( a plant ) ( growing ( where ( it ( ( is n't ) wanted ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (ADJP (RBS most) (JJ basic)) (NN definition)) (PP (IN of) (NP (DT a) (NN weed)))) (VP (VBZ is) (NP (NP (DT a) (NN plant)) (VP (VBG growing) (SBAR (WHADVP (WRB where)) (S (NP (PRP it)) (VP (VBZ is) (RB n't) (VP (VBN wanted)))))))) (. .)))
The most basic definition of a weed is a plant growing where it isn't 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)))) (. .)))