three minutes of dialogue , 30 seconds of plot 
(ROOT (NP (NP (NP (CD three) (NNS minutes)) (PP (IN of) (NP (NN dialogue)))) (, ,) (NP (NP (CD 30) (NNS seconds)) (PP (IN of) (NP (NN plot))))))
(ROOT (NP (NP (NP (CD ) (NNS )) (PP (IN ) (NP (NN )))) (, ) (NP (NP (CD ) (NNS )) (PP (IN ) (NP (NN ))))))