(SINV (SINV (QT (DQL ``) (QTC (S (NP (BASENP (DT These) (NNS pieces)) (PP (IN of) (BASENP (NN debris)))) (VP (VBP have) (VP (VBN been) (VP (VP (VBG causing) (BASENP (JJ sonic) (NNS booms))) (COMMA ,) (VP (VBG resulting) (PP (IN in) (NP (NP (BASENP (NNS vibrations)) (VP (VBN felt) (PP (IN by) (BASENP (DT some) (NNS residents))))) (CONJP (COMMA ,) (CONJP (ADVP (RB as) (RB well)) (IN as))) (NP (NP (BASENP (NNS flashes)) (PP (IN of) (BASENP (NN light)))) (PP (IN across) (BASENP (DT the) (NN sky))))))))))) (COMMA ,)) (DQR '')) (SINV (SINV (SINV (VP (VBD said)) (BASENP (DT the) (NNP NOAA))) (PP (IN on) (BASENP (NNP Friday)))) (PP (IN in) (NP (BASENP (DT an) (JJ public) (NN information) (NN alert)) (VP (VBN posted) (PP (IN on) (BASENP (PRPD their) (NN website)))))))) (PERIOD .))