a diverting -- if predictable -- adventure suitable for a matinee 
(ROOT (NP (NP (DT a) (ADJP (NN diverting) (, --) (SBAR (IN if) (FRAG (ADJP (JJ predictable)))) (, --)) (NN adventure)) (ADJP (JJ suitable) (PP (IN for) (NP (DT a) (NN matinee))))))
(ROOT (NP (NP (DT ) (ADJP (NN ) (, ) (SBAR (IN ) (FRAG (ADJP (JJ )))) (, )) (NN )) (ADJP (JJ ) (PP (IN ) (NP (DT ) (NN ))))))