Carry is related to Action. Action is related to Blessing. Blessing is a type of Support. 
Oil is related to Export. Export is a type of Commodity. Commodity is related to Gas. 
Carry <--RelatedTo--> Action <--RelatedTo--> Blessing --IsA--> Support 
Oil <--RelatedTo--> Export --IsA--> Commodity <--RelatedTo--> Gas 