Total is related to Population. Population is related to Head. Head is a synonym of Director. 
Complicated is a different concept from Plain. Plain is a synonym of Simple. Simple is a synonym of Bare. 
Total <--RelatedTo--> Population <--RelatedTo--> Head <--Synonym--> Director 
Complicated <--DistinctFrom--> Plain <--Synonym--> Simple <--Synonym--> Bare 