(S (S (NP (NP (BASENP (DT The) (NNP Ministry)) (PP (IN of) (BASENP (NNP Defense)))) (PP (IN in) (BASENP (DT the) (NNP United) (NNP Kingdom)))) (VP (VBD released) (NP (BASENP (DT a) (NN statement)) (SBAR (IN that) (S (NP (BASENP (DT the) (JJ Russian) (NNP Tupolev) (NNP Tu-95) (NNP Bear) (NN aircraft)) (PRN (COMMA ,) (VP (VBG flying) (PP (IN in) (BASENP (NN four) (JJ loosed) (NNS pairs)))) (COMMA ,))) (VP (VBD were) (VP (VP (VBN tracked) (PP (IN by) (BASENP (JJ Norwegian) (NN aircraft)))) (PP (IN before) (S (VP (VP (VBG entering) (BASENP (NNP Nato) (NN airspace))) (PP (IN on) (BASENP (NNP Thursday) (NN morning))))))))))))) (PERIOD .))