String is a type of Remove. String is a synonym of Draw. Rule is a type of Draw. Rule is a synonym of Convention. 
Pistol can be Dangerous. Dangerous is a synonym of Risky. Surgery can be Risky. Surgeon is derived from Surgery. 
Remove <--IsA-- String <--Synonym--> Draw <--IsA-- Rule <--Synonym--> Convention 
Pistol --HasProperty--> Dangerous <--Synonym--> Risky <--HasProperty-- Surgery <--DerivedFrom-- Surgeon 