(S (S (BASENP (DT The) (NN investigation)) (VP (VBD was) (VP (VBN performed) (PP (IN by) (NP (BASENP (NN two) (NNP US) (NNS groups)) (COMMA ,) (NP (BASENP (DT the) (NNP FBI)) (CC and) (NP (BASENP (DT the) (NNP Department)) (PP (IN of) (BASENP (NNP Justice)))))))))) (PERIOD .))