(S (S (BASENP (DT The) (NN report)) (VP (VBD found) (SBAR (IN that) (S (NP (BASENP (DT the) (NNP 737)) (PRN (COMMA ,) (VP (VBN registered) (BASENP (NNP PK-KKW))) (COMMA ,))) (VP (VBD suffered) (NP (DT a) (NP (NP (BASENP (NNP Inertial) (NNP Reference) (NNP System)) (PRN (LRB -LRB-) (BASENP (NNP IRS)) (RRB -RRB-))) (NN failure)))))))) (PERIOD .))