Input: Relationship: 'be president emeritus of', Argument/Subject 1: 'katz', Argument/Subject 2: 'american council of learn society'

Answer: In his keynote address , Stanley Katz , director of the Princeton University Center for Arts and Cultural Policy Studies and president emeritus of the American Council of Learned Societies , spoke about librariansskills both in acquiring materials and serving as intermediaries between information and the users .