(S (S (NP (BASENP (NN Stock) (NNS prices)) (PP (IN of) (NP (CC both) (NP (BASENP (NNP Microsoft)) (CC and) (BASENP (NNP Yahoo) (NNP !)))))) (VP (VBP have) (VP (VBN decreased) (PP (IN during) (BASENP (DT the) (NN merger) (NNS discussions)))))) (PERIOD .))