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 "United States House Select Committee on Benghazi"): During that event, the U.S. diplomatic mission in Benghazi, Libya was attacked, resulting in the deaths of the U.S. ambassador to that country, J. Christopher Stevens, and three other Americans.
Relevant evidence: No