as it is hard to resist 
(ROOT (SBAR (IN as) (S (NP (NP (PRP it))) (VP (VBZ is) (ADJP (JJ hard)) (S (VP (TO to) (VP (VB resist))))))))
(ROOT (SBAR (IN ) (S (NP (NP (PRP ))) (VP (VBZ ) (ADJP (JJ )) (S (VP (TO ) (VP (VB ))))))))