Coach is related to Instructor. Instructor is the opposite of Student. Student is a type of Worker. 
Wife is related to Sheep. Sheep is related to Peaceful. Peaceful is related to Content. Content is related to Glass. 
Coach <--RelatedTo--> Instructor <--Antonym--> Student --IsA--> Worker 
Wife <--RelatedTo--> Sheep <--RelatedTo--> Peaceful <--RelatedTo--> Content <--RelatedTo--> Glass 