Sensor is a type of Device. Guard is a type of Device. Guard is related to Stuff. Stuff is related to Carry. 
Loyalty is a type of Virtue. Charity is a type of Virtue. Charity is related to Give. Award is a type of Give. 
Sensor --IsA--> Device <--IsA-- Guard <--RelatedTo--> Stuff <--RelatedTo--> Carry 
Loyalty --IsA--> Virtue <--IsA-- Charity <--RelatedTo--> Give <--IsA-- Award 