Brighton Marathon จัดขึ้นปีละกี่ครั้ง?ไม่จำเป็นต้องใช้ตารางทั้งหมด
How many times a year is the Brighton Marathon held?It is not neccessary to use all the tables.
 table_26166836_3:  (month_held [ VARCHAR ] distance [ VARCHAR ] location [ VARCHAR) ]
SELECT COUNT(month_held) FROM table_26166836_3 WHERE distance = "Marathon" AND location = "Brighton"