Question: The Jordanian jihadist who was also known as the "Shaykh of the slaughterers" was blamed for the deaths of how many during the 2004 Iraq churches attack in 2004?
Sentence (from "2004 Iraq churches attacks"): On August 1, 2004, a series of car bomb attacks took place during the Sunday evening Mass in churches of two Iraqi cities, Baghdad and Mosul.
Relevant evidence: Yes