(S (S (NP (BASENP (NN Hijacking)) (PP (IN off) (NP (BASENP (DT the) (NN coast)) (PP (IN of) (BASENP (NNP Somalia)))))) (VP (VBZ has) (VP (VBN become) (ADJP (ADJP (RB increasingly) (JJ common)) (PP (IN over) (BASENP (DT the) (JJ last) (NN decade))))))) (PERIOD .))