Enthusiasm is related to Active. Active is related to Dance. Dance is related to Motion. Migration is a type of Motion. 
Moon can be used for Observation. Moon is related to Body. Body is related to Eye. 
Enthusiasm <--RelatedTo--> Active <--RelatedTo--> Dance <--RelatedTo--> Motion <--IsA-- Migration 
Observation <--UsedFor-- Moon <--RelatedTo--> Body <--RelatedTo--> Eye 