(S (S (BASENP (NNP Thailand)) (VP (VBZ has) (VP (ADVP (RB further)) (VP (VBN threatened) (S (VP (TO to) (VP (VB close) (NP (BASENP (NNS borders)) (PP (IN with) (BASENP (PRPD its) (NN neighbor))))))))))) (PERIOD .))