be of interest primarily to its target audience 
(ROOT (VP (VB be) (PP (IN of) (NP (NN interest))) (PP (ADVP (RB primarily)) (IN to) (NP (PRP$ its) (NN target) (NN audience)))))
(ROOT (VP (VB ) (PP (IN ) (NP (NN ))) (PP (ADVP (RB )) (IN ) (NP (PRP$ ) (NN ) (NN )))))