Duty is related to Military. Military is related to Commander. Commander is a type of Leader. Leader is related to Pack. 
Burn is a synonym of Dry. Dry is related to Climate. 
Duty <--RelatedTo--> Military <--RelatedTo--> Commander --IsA--> Leader <--RelatedTo--> Pack 
Burn <--Synonym--> Dry <--RelatedTo--> Climate 