I want to test the ability of students to read a passage and answer questions about it. Could you please come up with a good question for the passage "Within southern California are two major cities, Los Angeles and San Diego, as well as three of the country's largest metropolitan areas. With a population of 3,792,621, Los Angeles is the most populous city in California and the second most populous in the United States. To the south and with a population of 1,307,402 is San Diego, the second most populous city in the state and the eighth most populous in the nation."? 

The eight most populous city in the nation can be found where?