exceptional to justify a three hour running time 
(ROOT (ADJP (JJ exceptional) (S (VP (TO to) (VP (VB justify) (NP (DT a) (NML (CD three) (NN hour)) (VBG running) (NN time)))))))
(ROOT (ADJP (JJ ) (S (VP (TO ) (VP (VB ) (NP (DT ) (NML (CD ) (NN )) (VBG ) (NN )))))))