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 rio+20 summit in rio de janeiro held?" whose answer is 2012.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Rio+20 Summit date
Useful Output:

Doc 1: Meeting in Rio di Janeiro in November 2024, G20 leaders addressed major global challenges and crises and reiterated their commitment to
Doc 2: On 22 June 2012, the UN Conference on Sustainable Development (UNCSD, or Rio+20) adopted the outcome document titled “The Future We Want," and,
Doc 3: Rio+ 20 Conference : The UN Conference on Sustainable Development (UNCSD) will be held on June 20-22, June 2012 in Rio de Janeiro, Brazil. The
Doc 4: To celebrate 20 years of its first conference on sustainable development, the UN met in Rio from 20 to 22 June 2012, in the Earth Summit "Rio +
Doc 5: The summit gets its name from being held 20 years after the 1992 Rio earth summit that launched a number of landmark treaties, including ones to