I want to know the answer to the following question:
How many border crossings does San Diego share with Mexico?
All the background I'm provided with is that "A second, primarily commercial border crossing operates in the Otay Mesa area; it is the largest commercial crossing on the California-Baja California border and handles the third-highest volume of trucks and dollar value of trade among all United States-Mexico land crossings.". Is that enough to answer the question?
Answer: no