( Here ( , ( weeds ( ( means ( ( all plants ) ( which ( are ( found ( in ( places ( where ( humans ( ( do not ) ( want ( to ( have ( them growing ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (ADVP (RB Here)) (, ,) (NP (NNS weeds)) (VP (VBZ means) (NP (NP (DT all) (NNS plants)) (SBAR (WHNP (WDT which)) (S (VP (VBP are) (VP (VBN found) (PP (IN in) (NP (NP (NNS places)) (SBAR (WHADVP (WRB where)) (S (NP (NNS humans)) (VP (VBP do) (RB not) (VP (VB want) (S (VP (TO to) (VP (VB have) (S (NP (PRP them)) (ADJP (VBG growing)))))))))))))))))) (. .)))
Here, weeds means all plants which are found in places where humans do not want to have them growing.
(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)))) (. .)))