(S (S (S (BASENP (NNP Indonesia) (NNP Air) (NNP Traffic) (NNPS Controllers) (NNP Association) (NN chief) (NNP Adrie) (NNP Gunawan)) (VP (VBD said) (SBAR (IN that) (S (S (BASENP (NN 26) (NNS controllers)) (VP (VP (VBD left) (BASENP (DT the) (NN country))) (S (VP (VBG fearing) (BASENP (JJ possible) (NNS prosecutions)))))) (SBAR (IN if) (S (BASENP (NN anything)) (VP (VBD went) (ADJP (JJ wrong) (PP (IN on) (BASENP (PRPD their) (NN shift))))))))))) (COLON ;) (S (BASENP (PRP they)) (VP (ADVP (RB also)) (VP (VBD threatened) (S (VP (TO to) (VP (VB strike)))))))) (PERIOD .))