With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Lyme disease was first diagnosed in Connecticut.
text_B: The Jonesborough ambush took place on 20 March 1989 near the Irish border outside the village of Jonesborough , County Armagh , Northern Ireland .. Jonesborough. Jonesborough, County Armagh. County Armagh. County Armagh. Northern Ireland. Northern Ireland. Irish border. Republic of Ireland – United Kingdom border. Two senior Royal Ulster Constabulary -LRB- RUC -RRB- officers , Chief Superintendent Harry Breen and Superintendent Bob Buchanan , were shot dead in an ambush by the Provisional IRA South Armagh Brigade .. Royal Ulster Constabulary. Royal Ulster Constabulary. Provisional IRA South Armagh Brigade. Provisional IRA South Armagh Brigade. IRA. Provisional Irish Republican Army. Breen and Buchanan were returning from an informal cross-border security conference in Dundalk with senior Garda officers when Buchanan 's car -- a red Vauxhall Cavalier -- was flagged down and fired upon by six IRA gunmen , who the policemen had taken for British soldiers .. Dundalk. Dundalk. Garda. Garda Siochana. Vauxhall Cavalier. Vauxhall Cavalier. IRA. Provisional Irish Republican Army. Buchanan was killed outright whilst Breen , suffering gunshot wounds , was deliberately shot in the back of the head after he had left the car waving a white handkerchief .. They were the highest-ranking RUC officers to be killed during the Troubles .. the Troubles. the Troubles. To date nobody has been charged with killing the two officers .. There have been allegations that the attack was the result of collusion between the Gardai and the Provisional IRA .. IRA. Provisional Irish Republican Army. Canadian judge Peter Cory investigated the killings in 2003 ; his findings were published in a report .. Peter Cory. Peter Cory. This led to the Irish government setting up the Smithwick Tribunal , a judicial inquiry into the killings which opened in Dublin in June 2011 and published its final report in December 2013 .. Irish government. Irish government. Smithwick Tribunal. Smithwick Tribunal. Dublin. Dublin. In the report Judge Peter Smithwick stated that ` on balance of probability ' , somebody inside the Dundalk Garda station had passed on information to the IRA regarding the presence of Breen and Buchanan .. Dundalk. Dundalk. Garda. Garda Siochana. IRA. Provisional Irish Republican Army
not_related.