Thumb is related to Toe. Toe is related to Set. Set is related to Color. 
Debut is a type of Presentation. Debut is related to Song. Song is related to Performance. 
Thumb <--RelatedTo--> Toe <--RelatedTo--> Set <--RelatedTo--> Color 
Presentation <--IsA-- Debut <--RelatedTo--> Song <--RelatedTo--> Performance 