Swim is related to Athletic. Athletic is related to Dance. Dance is related to Entertainment. Entertainment is related to Comedy. 
Fundamental is related to Reading. Light can be used for Reading. Light is related to Color. Color is related to Fall. 
Swim <--RelatedTo--> Athletic <--RelatedTo--> Dance <--RelatedTo--> Entertainment <--RelatedTo--> Comedy 
Fundamental <--RelatedTo--> Reading <--UsedFor-- Light <--RelatedTo--> Color <--RelatedTo--> Fall 