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: "Which  international border is San Ysidro Port of Entry at?" whose answer is The Mexico–United States border.
Each document should contain about 30 words, and these documents should contain useful information.

Query: San Ysidro Port of Entry international border
Useful Output:

Doc 1: Otay Mesa Port of Entry - Class A. Phone Number: (619) 671-8900. Fax Number: (619) 661-3392. Hours of Operation: 24 Hours, Seven Days a Week
Doc 2: Vehicles wait in line to cross the border into the United States at the San Ysidro Port of Entry on March 18 in Tijuana, Mexico.
Doc 3: CBS 8 spoke with a local business owner and a human rights advocate on the border wait times at San Ysidro, who had mixed opinions.
Doc 4: The San Ysidro Land Port of Entry (LPOE) is the busiest land border crossing in the Western Hemisphere; currently processing an average of 70,000 northbound
Doc 5: Governor Newsom is announcing new construction to support a new port-of-entry at the California-Mexico border to support growing international trade.