you are likely to find Feather in/at/on Hat. Helmet is a type of Hat. Helmet is related to Construction. 
Unit is related to Bone. Bone is related to Like. Like is related to Number. Number is related to Cost. 
Feather --AtLocation--> Hat <--IsA-- Helmet <--RelatedTo--> Construction 
Unit <--RelatedTo--> Bone <--RelatedTo--> Like <--RelatedTo--> Number <--RelatedTo--> Cost 