Which Russian empress was killed with her family in Yekaterinburg in July 1918?

An elver is a young one of which fish? What is the name of the street-side water connection firefighters use in emergencies? An empire began when Tom and Louis Borders opened what type of store in Ann Arbor, Michigan, in 1971? In 1867 an empire was established under Franz Joseph, emperor of Austria and king of which country? Which gas is used to give the Goodyear blimps their lift? Emergency medical technicians most often transport patients in which vehicle? What is the term for a milky emulsion of rubber or plastic particles, used in paints and gloves? In which Shakespeare play is Titania the enchanting queen of the fairies?