title: Carl Gustav Rehnskiöld
context: After the battle, Rehnskiöld became a prisoner of war in Russia and spent the years in captivity together with Count Carl Piper by running a management office in Moscow to assist the other Swedish prisoners of war. Rehnskiöld was exchanged in 1718 and arrived at the siege of Fredriksten just before Charles XII was shot to death. Rehnskiöld later served as commander in western Sweden and, suffering from an old shrapnel injury, died in 1722.
question: How did Count Carl Gustav Rehnskiöld die?
answers: suffering from an old shrapnel injury