상품명 : What Was 16 / San Francisco Earthquake?
상품명 : What Was 19 / Salem Witch Trials? (What Were)
상품명 : What Was 22 / Roaring Twenties? (What Were)
상품명 : Who Is 04 / Steven Spielberg? (Who Was)
상품명 : Who Is 05 / Hillary Clinton? (Who Was)