Premise: John D. Rockefeller . He is widely considered the wealthiest American of all time , and the richest person in modern history . As kerosene and gasoline grew in importance , Rockefeller 's wealth soared and he became the richest person in the country , controlling 90 % of all oil in the United States at his peak .
Hypothesis: John D. Rockefeller was the richest person in the United States.
Label: ENTAILMENT