The biggest benefactor by far has been Leonard Riggio , chairman of Barnes & Noble , who has been Dia 's chairman since 1998 .
Leonard Riggio /business/person/company Barnes & Noble
DT JJS NN IN RB VBZ VBN NNP NNP , NN IN NNP CC NNP , WP VBZ VBN NNP POS NN IN CD .
Leonard Riggio
PERSON
Barnes & Noble
ORGANIZATION
/business/person/company