May is related to Request. Claim is a type of Request. Claim is related to Action. Action is related to Boil. 
Nervous is a synonym of Anxious. Anxious is similar to Troubled. Troubled is related to Bridge. you are likely to find Debris in/at/on Bridge. 
May <--RelatedTo--> Request <--IsA-- Claim <--RelatedTo--> Action <--RelatedTo--> Boil 
Nervous <--Synonym--> Anxious <--SimilarTo--> Troubled <--RelatedTo--> Bridge <--AtLocation-- Debris 