Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_11240028_3 (portrayed_by VARCHAR, relationship VARCHAR)

### Question ###
How many characters were portrayed by the informant of don flack?

### Accurate SQL ###

SELECT COUNT(portrayed_by) FROM table_11240028_3 WHERE relationship = "Informant of Don Flack"