Lock is a type of Construct. Lock is related to Device. Device is a synonym of Project. Project is a type of Task. 
Excuse is a type of Request. Request is related to Claim. Claim is a type of Right. Right is similar to Outside. 
Construct <--IsA-- Lock <--RelatedTo--> Device <--Synonym--> Project --IsA--> Task 
Excuse --IsA--> Request <--RelatedTo--> Claim --IsA--> Right <--SimilarTo--> Outside 