(SINV (SINV (S (NP (NP (BASENP (NN Three) (NNS lifeboats)) (COMMA ,) (BASENP (NN two) (NN coastguard) (NNS teams))) (CC and) (BASENP (DT an) (NNP RAF) (NN helicopter))) (VP (VBP are) (VP (VBG searching) (PP (IN for) (NP (BASENP (DT the) (NN airplane)) (SBAR (WHNP (WDT which)) (S (VP (VBD was) (VP (VBN believed) (S (VP (TO to) (VP (VB have) (VP (VBN been) (VP (VP (VBG traveling) (PP (IN from) (BASENP (NNP Exeter)))) (PP (TO to) (BASENP (NNP Blackpool))))))))))))))))) (COMMA ,) (SINV (VP (VBZ says)) (BASENP (NNP Lancashire) (NNP Police)))) (PERIOD .))