CREATE TABLE table_31424 ("Prefix class" CLOB, "Type and usage" CLOB, "Example" CLOB, "Equivalent" CLOB, "Reference" CLOB)

What is every reference for the example of AF117?
SELECT "Reference" FROM table_31424 WHERE "Example" = 'AF117'
SELECT "Reference" FROM "table_31424" WHERE "Example" = 'AF117'