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 "On February 17, 2010, AF1 announced it would use the "Arena Football League" name. The league announced plans for the upcoming season and details of its contract with NFL Network to broadcast AFL games in 2010. AF1 teams were given the option of restoring historical names to their teams. In addition to the historical teams, the league added two new expansion franchises, the Dallas Vigilantes and the Jacksonville Sharks."? 

The National Football League refers to which acronym?