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: "who had the idea of the eiffel tower?" whose answer is Maurice Koechlin.
Each document should contain about 30 words, and these documents should contain useful information.

Query: who had the idea for the eiffel tower
Useful Output:

Doc 1: Eiffel had the idea of placing boxes filled with sand inside them, as was done in Ancient Egypt. Removing a little of the sand slightly
Doc 2: Although most people give full credit to Alexandre Gustave Eiffel for the existence of our treasured tower, the truth is he had some help;
Doc 3: Two young engineers, Emile Nouguier and Maurice Koechlin, approached Eiffel with a basic idea for a tower. After a few alterations, Eiffel
Doc 4: Though named after a project of Gustave Eiffel, the Eiffel Tower – symbol of Paris – has ist structural concept and form from the responsible
Doc 5: Since the second half of the XIX century, progress has been making many countries in the world build high-rise structures. Many of the projects