Question: The group that took responsibility for a mass shooting that happened in 1993 blamed it on an event carried out by who?
Sentence (from "Use of chemical weapons in the Syrian Civil War"): The UNHRC commission later confirmed the use of sarin in the Khan al-Asal, Saraqib and Ghouta attacks, but did not mention the Jobar and the Ashrafiyat Sahnaya attacks.
Relevant evidence: No