(S (S (BASENP (NNP BP) (NNS officials)) (VP (VP (VBP do) (RB not)) (VP (VB know) (SBAR (WHADVP (WRB how) (RB long)) (S (BASENP (DT the) (NN field)) (VP (MD will) (VP (VB stay) (ADJP (JJ offline))))))))) (PERIOD .))