(QT (DQL ``) (QTC (S (NP (BASENP (NNS Officers)) (PP (IN from) (BASENP (DT the) (NN fire) (CC and) (NN ambulance) (NNS services)))) (VP (VBP are) (PP (IN on) (BASENP (DT the) (NN scene))))) (PERIOD .)) (DQR ''))