is its reliance on formula , though 
(ROOT (VP (VBZ is) (NP (NP (PRP$ its) (NN reliance)) (PP (IN on) (NP (NN formula)))) (, ,) (ADVP (RB though))))
(ROOT (VP (VBZ ) (NP (NP (PRP$ ) (NN )) (PP (IN ) (NP (NN )))) (, ) (ADVP (RB ))))