(S (S (S (BASENP (JJ Emergency) (NNS workers)) (VP (VBD were) (VP (VP (VBN prevented) (PP (IN from) (S (VP (VP (VBG collecting) (BASENP (DT the) (VBN spilled) (NN oil))) (ADVP (RB immediately)))))) (PP (JJ due) (PP (TO to) (BASENP (JJ stormy) (NN weather))))))) (COLON ;) (S (NP (NP (BASENP (DT the) (NN head)) (PP (IN of) (BASENP (DT the) (NN state) (JJ environmental) (NN safety) (NN watchdog) (NNP Rosprorodnadzor)))) (PRN (COMMA ,) (BASENP (NNP Oleg) (NNP Mitvol)) (COMMA ,))) (VP (VBD said) (QT (DQL ``) (S (BASENP (EX there)) (VP (VBZ is) (NP (BASENP (JJ serious) (NN concern)) (SBAR (IN that) (S (BASENP (DT the) (NN spill)) (VP (MD will) (VP (VB continue)))))))) (DQR ''))))) (PERIOD .))