(S (S (BASENP (NNS Experts)) (VP (VP (VBP are) (VP (ADVP (RB still)) (VP (VBG warning) (PP (IN of) (BASENP (DT a) (JJ possible) (NN pandemic)))))) (COMMA ,) (S (VP (VBG prompting) (S (BASENP (DT the) (NN world) (NN bank)) (VP (VP (TO to) (VP (VB release) (BASENP (QP (DOLLAR US$) (NN 500) (NN million))))) (PP (IN in) (NP (BASENP (NN aid)) (SBAR (S (VP (TO to) (VP (VB assist) (S (BASENP (NNS countries)) (VP (VB combat) (BASENP (NN H5N1)))))))))))))))) (PERIOD .))