Gas can be used for Cooking. Cooking can cause/lead to Smoke. Smoke is related to Alarm. Alarm is related to Reminder. 
Capital is related to Chief. Chief is etymologically related to Cap. 
Gas --UsedFor--> Cooking --Causes--> Smoke <--RelatedTo--> Alarm <--RelatedTo--> Reminder 
Capital <--RelatedTo--> Chief --EtymologicallyRelatedTo--> Cap 