an extended dialogue exercise in retard 101 
(ROOT (NP (NP (DT an) (VBN extended) (NN dialogue) (NN exercise)) (PP (IN in) (NP (NN retard) (CD 101)))))
(ROOT (NP (NP (DT ) (VBN ) (NN ) (NN )) (PP (IN ) (NP (NN ) (CD )))))