The mayor of Chicago says the city is seeking nominations for potential sites to locate Amazon’s second headquarters.

Earlier this month, Amazon announced that it’s hunting for a second home outside Seattle.

The company said it will spend more than $5 billion to house as many as 50,000 employees.

The city says nominated sites must meet Amazon requirements, including having enough space, room for expansion and be near transit and O’Hare International Airport.

Amazon says it will make a decision next year.