(S (S (BASENP (NNP Operation) (NNP NANOOK) (NN 2008)) (VP (VBD was) (VP (VP (VP (VBN held) (PP (PP (IN from) (BASENP (NNP August) (NN 11))) (PP (TO to) (BASENP (NNP August) (NN 25))))) (PP (IN by) (BASENP (DT the) (NNP Canadian) (NNPS Forces)))) (PP (IN for) (NP (BASENP (DT the) (NN purpose)) (PP (IN of) (S (VP (VBG conducting) (NP (BASENP (JJ mock) (NN emergency) (NN rescue) (NNS operations)) (PP (IN for) (NP (BASENP (JJ potential) (JJ maritime) (NNS disasters)) (PP (IN in) (BASENP (DT the) (NNP northeastern) (NNP Canadian) (NNP Arctic) (NNS waters)))))))))))))) (PERIOD .))