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 san diego convention center built?" whose answer is March 1987 - November 1989.
Each document should contain about 30 words, and these documents should contain useful information.

Query: San Diego Convention Center construction date
Useful Output:

Doc 1: December 5, 1989 When the convention center was still under construction, many thought it wasn't big enough to attract the largest
Doc 2: 1978: The San Diego City Council approves the concept of building a convention center using $136 million in bonds. 1981: A proposal to build a
Doc 3: Owner: San Diego Convention Center Corporation; General Contractor: Birdair; Contracted by: Kinsman Construction; Completion Date: 2/22/18
Doc 4: San Diego approved the construction of a new convention center in 1983. It was built on land owned by the Port of San Diego. Construction of the building
Doc 5: In November 1989, the San Diego Convention Center opened for business after two and a half years of construction. The demand to book an event was so high