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: "when was the red cross symbol first used?" whose answer is 1864.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when was the red cross symbol first used
Useful Output:

Doc 1: Why was the Red Cross emblem, adopted in 1864 at the First Diplomatic Conference at Geneva? During the Diplomatic Conference in 1864, Red Cross
Doc 2: J&J began using the symbol in 1887, after it was first formally adopted in Switzerland in 1864. The American Red Cross was founded in 1881,
Doc 3: A red cross made of five equal squares on a white background was officially recognised as the distinctive sign of medical services of armed forces.
Doc 4: The Red Cross logo was created at the conference of 1864 in Geneva. It was simply inspired by the Switzerland flag where the organization was
Doc 5: The red cross emblem came into existence more than 150 years ago when the Geneva Conventions adopted it to protect medical personnel