You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "Under which number president did Arthur A. Ballantine become solicitor of the Internal Revenue Service?" whose answer is 31st.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Arthur A. Ballantine solicitor of the Internal Revenue Service president term
Useful Output:

Doc 1: Published as part of a continuing series of historical studies to preserve and disseminate the history of the Internal Revenue Service and tax
Doc 2: He became Solicitor of the Internal Revenue Service in 1918 and, in 1927  Ballantine, a former president (1891‑1906) of Oberlin College. This
Doc 3: Arthur A. Ballantine (1883–1960) was a 20th-century American lawyer, tax specialist, who became the first solicitor of the Internal Revenue Service
Doc 4: Internal Revenue Code on retirement benefits which may be paid under plans qualified under the Internal Revenue Code. United has agreed to provide under non
Doc 5: Chester Alan Arthur (October 5, 1829 – November 18, 1886) was the 21st president of the United States, serving from 1881 to 1885. He was a Republican from