PERSON@1 , PERSON@2 , PERSON@3 : The Last Great Tsar , -LRB- Freepress NUMBER@1 -RRB- p. NUMBER@2 NUMBER@3 : Bomb at LOCATION@1 , LOCATION@2 during a labor rally caused the Haymarket Riot which killed twelve people .

NUMBER@3 Bomb at LOCATION@1 , LOCATION@2 during a labor rally kills NUMBER@4 .
