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: "what's the tallest building in the world right now?" whose answer is Burj Khalifa.
Each document should contain about 30 words, and these documents should contain useful information.

Query: tallest building in the world
Useful Output:

Doc 1: List of Top Ten Tallest Buildings in the World 2020 · Burj Khalifa - 828 meters - UAE · Shanghai Tower - 632 meters - China · KXJB-TV Tower -
Doc 2: 20 Tallest Buildings in the World 2025 · 1. Burj Khalifa · 2. Merdeka 118 · 3. Shanghai Tower · 4. Abraj Al Bait · 5. Ping An Finance Center · 6
Doc 3: Jeddah Tower will surpass the Burj Khalifa in height by at least 173 metres. While its total number of floors is yet to be confirmed, reports
Doc 4: This is fake, we all know 256 blocks is the max building limit. 18:41 Go to channel Tallest Skyscrapers in the World (3D Size Comparison)
Doc 5: Beating the UAE's Burj Khalifa by about 172 meters, the Jeddah Tower will be over 1,000 meters in height and span 1.5 square kilometers in its