CREATE TABLE table_name_54 (perpetrator VARCHAR2, killed VARCHAR2, country VARCHAR2, location VARCHAR2)

Who is the perpetrator in Uganda who killed 12 in Kampala?
SELECT perpetrator FROM table_name_54 WHERE country = "uganda" AND location = "kampala" AND killed = "12"
SELECT "perpetrator" FROM "table_name_54" WHERE "12" = "killed" AND "country" = "uganda" AND "kampala" = "location"