(S (S (BASENP (DT The) (NN Operation)) (VP (VP (VBD extended) (PP (TO to) (NP (BASENP (NNP Davis) (NNP Strait)) (CONJP (COMMA ,) (CC and)) (BASENP (NNP Frobisher) (NNP Bay))))) (PP (IN during) (BASENP (DT the) (JJ annual) (NNP NANOOK) (NNP Operation))))) (PERIOD .))