Bell is related to Save. Save is related to Reserve. Reserve is related to Oil. Oil is related to Become. 
Regulate is a synonym of Order. Order is a synonym of Instruction. 
Bell <--RelatedTo--> Save <--RelatedTo--> Reserve <--RelatedTo--> Oil <--RelatedTo--> Become 
Regulate <--Synonym--> Order <--Synonym--> Instruction 