Demographic is related to Population. Population is a type of People. Clock can be used for People. you are likely to find Clock in/at/on Desk. 
Head is a type of Direct. Direct is related to Flight. Flight is a type of Creativity. Creativity requires Inspiration. 
Demographic <--RelatedTo--> Population --IsA--> People <--UsedFor-- Clock --AtLocation--> Desk 
Head --IsA--> Direct <--RelatedTo--> Flight --IsA--> Creativity --HasPrerequisite--> Inspiration 