(S (S (BASENP (DT Some) (NNS observers)) (VP (VBP think) (SBAR (S (BASENP (PRP it)) (VP (VP (VBZ is) (ADJP (JJ possible))) (SBAR (IN that) (S (BASENP (DT the) (DOLLAR $) (NN 100) (NN barrier)) (VP (MD may) (VP (VB be) (VP (VBN broken))))))))))) (PERIOD .))