(S (S (BASENP (DT The) (NN investigation)) (VP (VBZ is) (NP (BASENP (DT the) (JJ only) (NN one)) (VP (ADVP (RB ever)) (VP (VBN conducted) (PP (IN into) (NP (BASENP (NN dog) (NN fighting)) (PP (IN in) (BASENP (NNP Finland)))))))))) (PERIOD .))