by that measure , it is a failure . 
(ROOT (S (PP (IN by) (NP (DT that) (NN measure))) (, ,) (NP (PRP it)) (VP (VBZ is) (NP (DT a) (NN failure))) (. .)))
(ROOT (S (PP (IN ) (NP (DT ) (NN ))) (, ) (NP (PRP )) (VP (VBZ ) (NP (DT ) (NN ))) (. )))