Question: The attack on what city in Libya by members of the Islamic group Ansar al-Sharia led to the formation of a committee with Trey Gowdy as it's chairman?
Sentence (from "2012 Benghazi attack"): The 2012 Benghazi attack refers to a coordinated attack against two United States government facilities in Benghazi, Libya by members of the Islamic militant group Ansar al-Sharia.
Relevant evidence: Yes