(S (S (BASENP (DT The) (NN opposition)) (VP (VP (VBZ has) (VP (VBN contested) (BASENP (DT the) (NN election) (NNS results)))) (CC and) (VP (VBD boycotted) (NP (BASENP (DT the) (NN president) (POS 's)) (NN inauguration))))) (PERIOD .))