Farmer is related to Food. Food is related to Glad. Glad is related to Relief. 
Define is a type of Specify. Specify is a synonym of Specialize. Specialize is a type of Modify. Modify is related to Fix. 
Farmer <--RelatedTo--> Food <--RelatedTo--> Glad <--RelatedTo--> Relief 
Define --IsA--> Specify <--Synonym--> Specialize --IsA--> Modify <--RelatedTo--> Fix 