Crop is related to Collection. Defense is a type of Collection. Defensive is derived from Defense. 
Fault is related to Earthquake. Earthquake is related to Shock. Shock is related to Better. 
Crop <--RelatedTo--> Collection <--IsA-- Defense <--DerivedFrom-- Defensive 
Fault <--RelatedTo--> Earthquake <--RelatedTo--> Shock <--RelatedTo--> Better 