Mac Stiofain died _________.

The former leader of the so-called Provisional Irish Republican Army, Sean Mac Stiofain, died Friday at the age of 73.
   The IRA linked Sinn Fein party says he died in a hospital in Navan, northwest of Dublin.
   Mac Stiofain was the first chief of staff of the Provisional IRA after the paramilitary group split from the more political official IRA.
   He was a member of the IRA delegation that held secret peace negotiations with the British government in 1972.
   Mac Stiofain was arrested in the same year and jailed for six months for IRA membership. He staged a hunger strike for 57 days before calling it elf.
   He was born John Stephenson in London in 1928.