CREATE TABLE table_15585 ("Date" CLOB, "Location" CLOB, "Nature of incident" CLOB, "Circumstances" CLOB, "Casualties" CLOB)

How many casualties were from the IED circumstance?
SELECT "Casualties" FROM table_15585 WHERE "Circumstances" = 'ied'
SELECT "Casualties" FROM "table_15585" WHERE "Circumstances" = 'ied'