Deborah Tannen , a Georgetown University linguist who is an expert on political discourse , said public apologies began to proliferate in the Clinton era .
Deborah Tannen /business/person/company Georgetown University
NNP NNP , DT NNP NNP NN WP VBZ DT NN IN JJ NN , VBD JJ NNS VBD TO VB IN DT NNP NN .
Deborah Tannen
PERSON
Georgetown University
ORGANIZATION
/business/person/company