Endless is related to Time. Time is related to Period. 
Average is a synonym of Rank. Rank is related to Chief. Chief is related to Village. you are likely to find Mill in/at/on Village. 
Endless <--RelatedTo--> Time <--RelatedTo--> Period 
Average <--Synonym--> Rank <--RelatedTo--> Chief <--RelatedTo--> Village <--AtLocation-- Mill 