(S (S (S (BASENP (DT The) (NNP UK) (NNP Border) (NNP Agency)) (VP (VBZ is) (VP (VBG investigating) (BASENP (DT a) (JJ possible) (NN visa) (NN scam))))) (SBAR (IN whereby) (S (BASENP (JJ foreign) (NNS students)) (VP (VBD were) (VP (VBN sold) (NP (BASENP (NN exam) (NNS answers)) (PP (IN for) (NP (BASENP (DT a) (NN qualification)) (VP (VBG leading) (PP (TO to) (NP (BASENP (NNP UoW) (NN entry)) (CC and) (BASENP (JJ British) (NNS visas))))))))))))) (PERIOD .))