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 eiffel tower finished being built?" whose answer is 15 March 1889.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when was the eiffel tower finished being built
Useful Output:

Doc 1: The Eiffel Tower was built in record time: 2 years, 2 months and 5 days. From late January 1887 to March 31, 1889. In addition to the technical
Doc 2: 1888: Construction is stalled · 1889: The tower is completed · 1900: A project is aborted, though structural changes persist · 1925: The tower
Doc 3: The Eiffel Tower was initially intended to be a temporary installation for the 1889 Paris Exposition, but it has become an iconic landmark
Doc 4: It is also a technological masterpiece in building-construction history. It was designed and built (1887–89) by Gustave Eiffel and named in his
Doc 5: It was built between 1887 and 1889 for the Exposition Universelle (World Fair). It was supposed to be a temporary installation for the 1889 World Fair, held at