Known is related to Introduce. Introduce is related to Writing. Writing is related to Subject. Subject is a synonym of Dependent. 
you are likely to find Security in/at/on Concert. Security is related to Bolt. Bolt is related to Lightning. Lightning is related to Power. 
Known <--RelatedTo--> Introduce <--RelatedTo--> Writing <--RelatedTo--> Subject <--Synonym--> Dependent 
Concert <--AtLocation-- Security <--RelatedTo--> Bolt <--RelatedTo--> Lightning <--RelatedTo--> Power 