sentences:  Survivors with their Bartian chief escaped to Hrodna in the Grand Duchy of Lithuania where they joined some of the Bartians, Skalvians, and all of the Nadruvians, who fled there after the Great Uprising.The last two Prussian attempts to rid itself of the Teutonic rule were made relying on the foreign powers who were enemies of the Knights.The first one in 1286, also known as the fourth uprising, depended upon help from the Duke of Rügen, the grandson of Swantopolk.