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: "Lynda Bird Johnson Robb is the oldest living child of a U.S. President following the death of a United States Army officer who served as the United States Ambassador to where?" whose answer is Belgium.
Each document should contain about 30 words, and these documents should contain useful information.

Query: U.S. Army officer who served as U.S. Ambassador and died
Useful Output:

Doc 1: On October 19, a bomb exploded in the bedroom of U.S. ambassador to France Myron T. Herrick. Herrick had taken his post in July and at the time
Doc 2:  soldier who started as a second lieutenant, a rank earned as a Reserve Officer Training Corps student at City College of New York, Powell served
Doc 3: Colin Powell, the first Black U.S. secretary of state, a top military officer and a national security adviser, died on Monday at age 84 due
Doc 4: Colin Powell became the first Black US secretary of state and top military officer during decades as one of America's most prominent leaders.
Doc 5: Mr. Dean, a career foreign service officer who favored diplomacy over military action, died on June 6 at his home in Paris, his family said. He was 93.