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: "how much did it cost to build the chesapeake bay bridge tunnel?" whose answer is almost $200 million.
Each document should contain about 30 words, and these documents should contain useful information.

Query: cost to build the chesapeake bay bridge tunnel
Useful Output:

Doc 1: Estimated Cost. $200 Million. Vehicles Crossed. over 140 million  building and operating the Chesapeake Bay Bridge–Tunnel. Expansion
Doc 2: The state added a second three-lane span in 1973, at a cost of $117 million. The bridge did more than just ease beach access for residents of
Doc 3: The project will cost from $5.4-$8.9 billion, depending on which construction methods are chosen. But a preliminary study concludes that the
Doc 4: "The new tunnel's cost is more than $750 million, which is being paid for by toll increases every five years.".
Doc 5: How much is the Chesapeake Bay Bridge Toll? ; Initial Crossing, $ 16.00, $21.00 ; Return trip w/in 24-hrs (E-ZPass only), $6.00, $1.00 ; Class 1