its premise is smart , but the execution is pretty weary 
(ROOT (S (S (NP (PRP$ its) (NN premise)) (VP (VBZ is) (ADJP (JJ smart)))) (, ,) (CC but) (S (NP (DT the) (NN execution)) (VP (VBZ is) (ADJP (RB pretty) (JJ weary))))))
(ROOT (S (S (NP (PRP$ ) (NN )) (VP (VBZ ) (ADJP (JJ )))) (, ) (CC ) (S (NP (DT ) (NN )) (VP (VBZ ) (ADJP (RB ) (JJ ))))))