Dave Was Injured in a Hang-Gliding Accident at a Hang-Gliding

True/False

Dave was injured in a hang-gliding accident at a hang-gliding school,and would like to sue the owners of the school.Before they would allow him to take classes,the owners of the school had Dave sign a document that said that the school would not be responsible,legally or physically,for Dave's safety.This kind of document is called a release.