Question: The 1994 Shankill Road killings took place on 16 June 1994, the Loughinisland massacre, is believed to have been a further retaliation, it took place on which date, in the small village of Loughinisland, County Down, Northern Ireland? 
Sentence (from "1994 Shankill Road killings"): The Loughinisland massacre, two days later, is believed to have been a further retaliation.
Relevant evidence: Yes