CREATE TABLE table_12653 ("Perpetrator" TEXT, "Year" TEXT, "Location" TEXT, "Country" TEXT, "Killed" TEXT)

Who is the perpetrator in Uganda who killed 12 in Kampala?
SELECT "Perpetrator" FROM table_12653 WHERE "Country" = 'uganda' AND "Location" = 'kampala' AND "Killed" = '12'
SELECT "Perpetrator" FROM "table_12653" WHERE "Country" = 'uganda' AND "Killed" = '12' AND "Location" = 'kampala'