(S (S (PP (IN Over) (BASENP (DT the) (JJ last) (NN year))) (S (BASENP (JJ multiple) (NNS countries)) (VP (VBP have) (VP (VP (VBN expressed) (BASENP (NN concern))) (CC or) (VP (VBN committed) (S (BASENP (PRPD their) (NNS navies)) (VP (TO to) (VP (VB dealing) (PP (IN with) (BASENP (JJ Somali) (NNS pirates))))))))))) (PERIOD .))