Police is a type of Force. Police is related to Investigation. Analysis is a type of Investigation. 
Chapter is a type of Phase. Phase is related to Steam. Steam is related to Power. Power is related to Charge. 
Force <--IsA-- Police <--RelatedTo--> Investigation <--IsA-- Analysis 
Chapter --IsA--> Phase <--RelatedTo--> Steam <--RelatedTo--> Power <--RelatedTo--> Charge 