CREATE TABLE table_16567 ("Character" CLOB, "Portrayed by" CLOB, "Relationship" CLOB, "First appearance" CLOB, "Last appearance" CLOB)

How many characters were portrayed by the informant of don flack?
SELECT COUNT("Portrayed by") FROM table_16567 WHERE "Relationship" = 'Informant of Don Flack'
SELECT COUNT("Portrayed by") FROM "table_16567" WHERE "Relationship" = 'Informant of Don Flack'