Join is related to Group. Group is related to Sheep. Sheep is related to Maker. 
Captain is related to Major. Major is related to Literature. Literature is related to Course. Course is related to Catalog. 
Join <--RelatedTo--> Group <--RelatedTo--> Sheep <--RelatedTo--> Maker 
Captain <--RelatedTo--> Major <--RelatedTo--> Literature <--RelatedTo--> Course <--RelatedTo--> Catalog 