( ( ( ( ( Nevertheless ( they ( surely ( ( are not ) ferns ) ) ) ) ( -LRB- ( ( which ( reproduce ( via spores ) ) ) -RRB- ) ) ) but ) ( flowering plants ) ) . )
(ROOT (S (S (S (ADVP (RB Nevertheless))) (NP (PRP they)) (ADVP (RB surely)) (VP (VBP are) (RB not) (ADJP (JJ ferns)))) (PRN (-LRB- -LRB-) (SBAR (WHNP (WDT which)) (S (VP (VB reproduce) (PP (IN via) (NP (NNS spores)))))) (-RRB- -RRB-)) (CC but) (S (VP (VBG flowering) (NP (NNS plants)))) (. .)))
Nevertheless they surely are not ferns (which reproduce via spores) but flowering plants.
(ROOT (S (NP (NNP Nonvascular) (NNS plants)) (VP (VB reproduce) (PP (IN with) (NP (NNS spores)))) (. .)))