Book is related to Back. Back is related to Slap. Slap is related to Hockey. 
Owner is related to Doll. Doll is related to Love. Love is a synonym of Sister. 
Book <--RelatedTo--> Back <--RelatedTo--> Slap <--RelatedTo--> Hockey 
Owner <--RelatedTo--> Doll <--RelatedTo--> Love <--Synonym--> Sister 