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: "Tightrope Walker is an outdoor bronze sculpture that commemorates an American soldier, lawyer, intelligence officer and diplomat best remembered as the wartime head of what?" whose answer is Office of Strategic Services.
Each document should contain about 30 words, and these documents should contain useful information.

Query: wartime head of the FBI or CIA by an American soldier, lawyer, intelligence officer and diplomat
Useful Output:

Doc 1: A history of the FBI from 1939 through the early-1950s, defined by important cases and national and international events, including World War II and the
Doc 2: William Donovan was a man who many hats, he was a decorated soldier, diplomat, intelligence officer, as well as a lawyer.
Doc 3: William J. Donovan was an American lawyer, soldier, and diplomat who directed (1942–45) the U.S. Office of Strategic Services (OSS) during World War II.
Doc 4: William Joseph "Wild Bill" Donovan KBE (January 1, 1883 – February 8, 1959) was an American soldier, lawyer, intelligence officer and diplomat.
Doc 5: In 1942, the Office of Strategic Services (OSS) became the first independent US intelligence agency. It only lasted for three years and three months.