(S (S (BASENP (NNP Interpol)) (VP (VBZ has) (VP (VBN been) (VP (VP (VBG investigating) (BASENP (NNP Madhavan))) (PP (IN in) (NP (BASENP (NNS allegations)) (ADJP (JJ related) (PP (TO to) (NP (NP (BASENP (PRPD his) (NN business) (NNS dealings)) (PP (IN with) (BASENP (NNP Serafin) (NNP Edwin)))) (PP (IN since) (BASENP (NN 2004)))))))))))) (PERIOD .))