sentences:  Udston mining disaster
  
  The Udston mining disaster occurred in Hamilton, Scotland on Saturday, 28 May 1887 when 73 miners died in a firedamp explosion at Udston Colliery.Caused, it is thought, by unauthorised shot firing the explosion is said to be Scotland's second worst coal mining disaster.Keir Hardie, then Secretary of the Scottish Miners' Federation, denounced the deaths as murder a few days later.