(S (S (BASENP (NNP Kuroyedov)) (VP (VBZ is) (VP (VBG being) (VP (VBN replaced) (PP (IN by) (NP (BASENP (NNP Vladimir) (NNP Masorin)) (COMMA ,) (SBAR (WHNP (WP who)) (S (VP (VBD was) (VP (ADVP (RB previously)) (VP (VBG serving) (PP (IN as) (NP (BASENP (DT the) (NNP Chief)) (PP (IN of) (NP (BASENP (NN staff)) (PP (IN for) (BASENP (DT the) (NNP Russian) (NNP Navy)))))))))))))))))) (PERIOD .))