(S (S (NP (BASENP (DT A) (NN prototype)) (PP (IN of) (BASENP (DT this) (NN machine)))) (VP (VBD was) (VP (VBN expected) (S (VP (TO to) (VP (VB be) (VP (VBN unveiled) (PP (IN at) (NP (NP (BASENP (DT the) (NNP Consumer) (NNP Electronics) (NNP Show)) (PP (IN in) (NP (BASENP (NNP Les) (NNP Vegas)) (COMMA ,) (BASENP (NNP Nevada))))) (COMMA ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ begins) (PP (IN in) (BASENP (DT a) (JJ few) (NNS days))))))))))))))) (PERIOD .))