romp that 's always fun to watch 
(ROOT (NP (NP (NN romp)) (SBAR (WHNP (DT that)) (S (VP (VBZ 's) (ADVP (RB always)) (ADJP (JJ fun)) (S (VP (TO to) (VP (VB watch)))))))))
(ROOT (NP (NP (NN )) (SBAR (WHNP (DT )) (S (VP (VBZ ) (ADVP (RB )) (ADJP (JJ )) (S (VP (TO ) (VP (VB )))))))))