Current is related to River. River is related to Actor. 
Allow is a synonym of Acknowledge. Acknowledge is related to Admit. Admit is related to Fault. Fault is related to Earthquake. 
Current <--RelatedTo--> River <--RelatedTo--> Actor 
Allow <--Synonym--> Acknowledge <--RelatedTo--> Admit <--RelatedTo--> Fault <--RelatedTo--> Earthquake 