Source is related to Electricity. you are likely to find Electricity in/at/on Opera. 
Latin is a synonym of Hispanic. Hispanic is a type of Human. African is a type of Human. African is related to Lion. 
Source <--RelatedTo--> Electricity --AtLocation--> Opera 
Latin <--Synonym--> Hispanic --IsA--> Human <--IsA-- African <--RelatedTo--> Lion 