(S (S (NP (NP (BASENP (NN Four) (NNS journalists)) (PP (IN from) (BASENP (NNP The) (NNP Sun) (NN newspaper)))) (CC and) (BASENP (NN one) (NN police) (NN officer))) (VP (VBP have) (VP (VBN been) (VP (VP (VBN arrested) (BASENP (NN today))) (PP (IN as) (NP (BASENP (NN part)) (PP (IN of) (NP (BASENP (NNP Operation) (NNP Elveden)) (COMMA ,) (NP (BASENP (DT the) (NN investigation)) (PP (IN into) (NP (NP (BASENP (NNS payments)) (PP (IN by) (NP (BASENP (NNS journalists)) (VP (VBG working) (PP (IN at) (BASENP (NNP News) (NNP International))))))) (PP (TO to) (BASENP (NN police) (NNS officers)))))))))))))) (PERIOD .))