(S (S (BASENP (NNS Cases)) (VP (VBP have) (VP (VP (VP (VBN multiplied) (PP (IN by) (BASENP (NN 25) (NNS times)))) (PP (IN since) (BASENP (NN 1998)))) (PP (IN at) (NP (BASENP (DT the) (NNP University)) (PP (IN of) (BASENP (NNP Chicago)))))))) (PERIOD .))