Scandal is a synonym of Dirt. Dirt is related to Ground. you are likely to find Pond in/at/on Ground. Pond is related to Small. 
you are likely to find People in/at/on Opera. you are likely to find People in/at/on Supermarket. 
Scandal <--Synonym--> Dirt <--RelatedTo--> Ground <--AtLocation-- Pond <--RelatedTo--> Small 
Opera <--AtLocation-- People --AtLocation--> Supermarket 