Destruction is related to Fire. Pop is a type of Fire. Pop is related to Population. 
Field is related to Sheep. Sheep is related to Ball. Ball is related to Throw. 
Destruction <--RelatedTo--> Fire <--IsA-- Pop <--RelatedTo--> Population 
Field <--RelatedTo--> Sheep <--RelatedTo--> Ball <--RelatedTo--> Throw 