Memory is related to Ability. Ability is related to Possible. Possible is related to Accomplishment. 
Son is related to Young. Young is related to Girl. Girl is related to Youth. Youth is related to Boy. 
Memory <--RelatedTo--> Ability <--RelatedTo--> Possible <--RelatedTo--> Accomplishment 
Son <--RelatedTo--> Young <--RelatedTo--> Girl <--RelatedTo--> Youth <--RelatedTo--> Boy 