Knee is related to Joint. Joint is a type of Separate. Separate is a synonym of Distinct. 
Farm is related to Sheep. Sheep is related to Large. Large is related to Factory. 
Knee <--RelatedTo--> Joint --IsA--> Separate <--Synonym--> Distinct 
Farm <--RelatedTo--> Sheep <--RelatedTo--> Large <--RelatedTo--> Factory 