Question: What is the ethnicity of the terrorist killed in a raid led by stealth helicopters in May 2011?
Sentence (from "May 2015 U.S. special forces raid in Syria"): Abu Sayyaf's role in ISIL was managing its gas and oil operations; he had built up a network of traders and wholesalers of ISIL-controlled oil that he helped triple energy revenues for the terror group.
Relevant evidence: No