Francis Howell High School is a four-year public high school located in Weldon Spring, Missouri. Approximately 1800 students from Defiance, Foristell, New Melle, O'Fallon, Saint Peters, Saint Charles, Weldon Spring, and Wentzville attend school at Howell. It is in the Francis Howell School District.

Based on the paragraph above can we conclude that "No one over 18 years old attends Francis Howell High School"?
It's impossible to say