el crimen del padre amaro would likely be most effective if used as a tool to rally anti-catholic protestors . 
(ROOT (S (NP (FW el) (FW crimen) (FW del) (NN padre) (NN amaro)) (VP (MD would) (ADVP (RB likely)) (VP (VB be) (ADJP (RBS most) (JJ effective)) (SBAR (IN if) (S (VP (VBN used) (PP (IN as) (NP (NP (DT a) (NN tool)) (SBAR (S (VP (TO to) (VP (VB rally) (NP (JJ anti-catholic) (NNS protestors))))))))))))) (. .)))
(ROOT (S (NP (FW ) (FW ) (FW ) (NN ) (NN )) (VP (MD ) (ADVP (RB )) (VP (VB ) (ADJP (RBS ) (JJ )) (SBAR (IN ) (S (VP (VBN ) (PP (IN ) (NP (NP (DT ) (NN )) (SBAR (S (VP (TO ) (VP (VB ) (NP (JJ ) (NNS ))))))))))))) (. )))