Mr. Rockefeller , one of the country 's richest men , was a great-grandson of John D. Rockefeller , a founder of Standard Oil .
Standard Oil /business/company/founders John D. Rockefeller
John D. Rockefeller /business/person/company Standard Oil
NNP NNP , CD IN DT NN POS JJS NNS , VBD DT NN IN NNP NNP NNP , DT NN IN NNP NNP .
Standard Oil
ORGANIZATION
John D. Rockefeller
PERSON
/business/company/founders
John D. Rockefeller
PERSON
Standard Oil
ORGANIZATION
/business/person/company