Question: When was the bombing for which The Balmoral Furniture Company bombing was thought to be a retaliation for?
Sentence (from "1971 Balmoral Furniture Company bombing"): It is widely believed that the bombing was carried out by members of the Provisional Irish Republican Army (IRA) in retaliation for the bombing of McGurk's pub a week earlier, which killed 15 Catholic civilians.
Relevant evidence: Yes