Question: Under which number president did Arthur A. Ballantine become solicitor of the Internal Revenue Service?
Sentence (from "Arthur A. Ballantine"): Arthur A. Ballantine (1883–1960) was a 20th-century American lawyer, tax specialist, who became the first solicitor of the Internal Revenue Service and Undersecretary of the Treasury under U.S. President Herbert Hoover and later partner in what became the Dewey Ballantine law firm.
Relevant evidence: Yes