(S (S (BASENP (JJ Russian) (NNP Prime) (NNP Minister) (NNP Vladimir) (NNP Putin)) (VP (VBD was) (VP (ADVP (RB immediately)) (VP (VP (VBN appointed) (PP (IN by) (NP (BASENP (NNP Dmitry) (NNP Medvedev)) (PRN (COMMA ,) (BASENP (DT the) (NN president)) (COMMA ,))))) (PP (IN as) (NP (BASENP (DT the) (NN head)) (PP (IN of) (NP (BASENP (DT the) (NN commission)) (SBAR (S (VP (TO to) (VP (VB investigate) (BASENP (DT the) (NN crash)))))))))))))) (PERIOD .))