(S (S (NP (ADJP (JJ Estonian) (CC and) (JJ Finnish)) (BASENP (NN oil) (NN spill) (NN response) (NNS vessels))) (VP (VBP are) (VP (VP (VBG working) (PRT (RP on))) (S (VP (VP (VBG cleaning) (PRT (RP up))) (NP (BASENP (DT the) (NN oil) (NN spill)) (VP (VBN caused) (PP (IN by) (NP (BASENP (DT the) (NN sinking)) (PP (IN of) (BASENP (DT the) (NNP Runner) (NNP 4)))))))))))) (PERIOD .))