(S (S (BASENP (DT A) (NNP U.S.) (NNP F-15) (NN fighter) (NN aircraft)) (VP (VP (VP (VBD crashed) (PP (IN into) (BASENP (DT the) (NN ocean)))) (BASENP (JJ early) (NNP Tuesday))) (PP (BASENP (QP (RB approximately) (NN 45)) (NNS miles)) (PP (IN off) (NP (BASENP (DT the) (NN coast)) (PP (IN of) (NP (BASENP (NNP Ikeijima) (NN island)) (COMMA ,) (NP (BASENP (NN part)) (PP (IN of) (BASENP (DT the) (NNP Okinawa) (NN chain))))))))))) (PERIOD .))