CREATE TABLE table_61816 ("Perpetrator" CLOB, "Date" CLOB, "Year" FLOAT, "Location" CLOB, "Country" CLOB, "Killed" FLOAT, "Additional Notes" CLOB)

What are the additional notes for Cotabato?
SELECT "Additional Notes" FROM table_61816 WHERE "Location" = 'cotabato'
SELECT "Additional Notes" FROM "table_61816" WHERE "Location" = 'cotabato'