Seven Network มีโฮสต์กี่โฮสต์?ไม่จำเป็นต้องใช้ตารางทั้งหมด
How many hosts were on Seven Network?It is not neccessary to use all the tables.
 table_14523485_9:  (host [ VARCHAR ] channel [ VARCHAR) ]
SELECT COUNT(host) FROM table_14523485_9 WHERE channel = "Seven Network"