be exasperated by a noticeable lack of pace 
(ROOT (S (VP (VB be) (VP (VBN exasperated) (PP (IN by) (NP (NP (DT a) (JJ noticeable) (NN lack)) (PP (IN of) (NP (NN pace)))))))))
(ROOT (S (VP (VB ) (VP (VBN ) (PP (IN ) (NP (NP (DT ) (JJ ) (NN )) (PP (IN ) (NP (NN )))))))))