( ( A weed ) ( ( can ( be ( described ( as ( ( any ( plant growing ) ) ( of ( ( its ( own accord ) ) ( in ( ( a place ) ( where ( it ( ( is not ) wanted ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT A) (NN weed)) (VP (MD can) (VP (VB be) (VP (VBN described) (PP (IN as) (NP (NP (DT any) (NN plant) (VBG growing)) (PP (IN of) (NP (NP (PRP$ its) (JJ own) (NN accord)) (PP (IN in) (NP (NP (DT a) (NN place)) (SBAR (WHADVP (WRB where)) (S (NP (PRP it)) (VP (VBZ is) (RB not) (VP (VBN wanted)))))))))))))) (. .)))
A weed can be described as any plant growing of its own accord in a place 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)))) (. .)))