(QT (DQL ``) (QTC (S (NP (NP (BASENP (DT The) (NN decomposition)) (PP (IN of) (BASENP (DT those) (NNS isotopes)))) (PRN (COLON -) (PP (IN over) (NP (BASENP (DT a) (NN period)) (PP (IN of) (BASENP (QP (RB about) (NN 7) (NN million)) (NNS years))))) (COLON -))) (VP (MD would) (VP (VB produce) (NP (BASENP (JJ enormous) (NNS amounts)) (PP (IN of) (BASENP (NN heat))))))) (PERIOD .)) (DQR ''))