Cousin is related to Family. Family is related to Pet. Pet is related to Creature. 
System is a type of Substance. Substance is related to Fire. Fire can Murder. Murder is a type of Crime. 
Cousin <--RelatedTo--> Family <--RelatedTo--> Pet <--RelatedTo--> Creature 
System --IsA--> Substance <--RelatedTo--> Fire --CapableOf--> Murder --IsA--> Crime 