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 is the tallest building in the northern hemisphere?" whose answer is Burj Khalifa.
Each document should contain about 30 words, and these documents should contain useful information.

Query: tallest building in the northern hemisphere
Useful Output:

Doc 1: What are the tallest buildings in the world? As the remarkable feats of modern engineering come to fruition, we see astounding skyscrapers
Doc 2: Aug 19. One World Trade Tower. Tallest building in the Northern Hemisphere!
Doc 3: North America - One World Trade Center  The One World Trade Center in New York City is the tallest building in North America. The 1,776 feet
Doc 4: One World Trade Tower. Tallest building in the Northern Hemisphere!
Doc 5: How tall is the Burj Khalifa? It stands 2,715 feet (828 meters) tall. It's been the world's tallest building since its construction in 2010,