CREATE TABLE table_68013 ("Date" CLOB, "Location" CLOB, "Nature of incident" CLOB, "Circumstances" CLOB, "Casualties" CLOB)

What was the date of natural cause situation?
SELECT "Date" FROM table_68013 WHERE "Circumstances" = 'natural cause'
SELECT "Date" FROM "table_68013" WHERE "Circumstances" = 'natural cause'