Sudden is related to Danger. Danger is related to Life. Life is related to Biological. 
you are likely to find Restaurant in/at/on Town. Town is related to Small. Small is related to Rule. Rule is related to Legislation. 
Sudden <--RelatedTo--> Danger <--RelatedTo--> Life <--RelatedTo--> Biological 
Restaurant --AtLocation--> Town <--RelatedTo--> Small <--RelatedTo--> Rule <--RelatedTo--> Legislation 