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: "a roman engineering device used to carry water over long distances is called an?" whose answer is Aqueduct.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Roman engineering device used to carry water over long distances
Useful Output:

Doc 1: The Roman aqueducts defined modern water distribution systems, and remain enduring testaments to the empire's remarkable ingenuity.
Doc 2: The Roman aqueduct was a channel used to transport fresh water to highly populated areas. Aqueducts were amazing feats of engineering given
Doc 3: Roman Engineering - Aqueducts · Comments.
Doc 4:  Roman knack for practical engineering on a monumental scale. This video explores how they were constructed and used. I'd like to thank Woosh
Doc 5: The Roman engineering device used to carry water over long distances is called an Aqueduct. Aqueducts were a vital part of ancient Roman