: an atrociously , mind-numbingly , indescribably bad movie 
(ROOT (FRAG (: :) (NP (DT an) (S (ADVP (RB atrociously)) (, ,) (NN mind) (HYPH -) (RB numbingly) (, ,) (ADJP (RB indescribably) (JJ bad))) (NN movie))))
(ROOT (FRAG (: ) (NP (DT ) (S (ADVP (RB )) (, ) (NN ) (HYPH ) (RB ) (, ) (ADJP (RB ) (JJ ))) (NN ))))