(S (S (BASENP (NNS Officials)) (VP (VP (VBD confirmed) (BASENP (DT the) (NN news))) (PP (IN after) (NP (BASENP (JJ Dutch) (NNS scientists)) (VP (VBN completed) (NP (BASENP (NNS tests)) (PP (IN on) (BASENP (DT the) (NN bone))))))))) (PERIOD .))