How many years are there between 1974 to 2011?

Otto von Bismarck believed in the concept of a? What was European peasants perspective on the crusades? How long has the fur trade been around for? How many years are between 1874 and 1963? What were the strengths and weaknesses of higher education during the Middle Ages? Why was there westward expansion in America? What is the Medieval symbol for steel? Were last name vigil come from? What did heraldic symbols eventually come to signify mean in the Middle Ages? Where did the surname Hulett originate? What was a key goal of cathedral architecture in the late Middle Ages? What is the difference between the verbs commemorate and celebrate? What were the revolutionary ideals adopted by the national assembly? What new invention created conflict between the homesteaders and the cowboys because it made it hard for them to complete their cattle drives? How many years are between 125CE and 2010? Why were the Roman soldiers called mules? What does the name malik mean? Why was frontinus so proud of the roman water system? Which shows the correct order for the steps of the writing process from earliest to latest? What is pornication?