Infant is related to Child. Child is related to Name. Signature is a type of Name. 
Sharp is related to Arrow. Arrow is related to Tip. Tip is related to Bullet. Bullet is related to Bite. 
Infant <--RelatedTo--> Child <--RelatedTo--> Name <--IsA-- Signature 
Sharp <--RelatedTo--> Arrow <--RelatedTo--> Tip <--RelatedTo--> Bullet <--RelatedTo--> Bite 