Pistol can be used for Fire. Fire is related to Very. 
Chart is related to Rank. Rank is related to Officer. Mate is a type of Officer. Mate is related to Candidate. 
Pistol --UsedFor--> Fire <--RelatedTo--> Very 
Chart <--RelatedTo--> Rank <--RelatedTo--> Officer <--IsA-- Mate <--RelatedTo--> Candidate 