you are likely to find People in/at/on Convention. Convention is a synonym of Pattern. Pattern is a synonym of Dynamic. Dynamic is a synonym of Active. 
Camera is related to Device. Device is related to Radio. Radio is related to Air. Air is related to Base. 
People --AtLocation--> Convention <--Synonym--> Pattern <--Synonym--> Dynamic <--Synonym--> Active 
Camera <--RelatedTo--> Device <--RelatedTo--> Radio <--RelatedTo--> Air <--RelatedTo--> Base 