Introduction is a synonym of Presentation. Debut is a type of Presentation. 
Hide is related to Run. Run is related to Spring. Spring is a synonym of Impulse. Impulse is a synonym of Stimulus. 
Introduction <--Synonym--> Presentation <--IsA-- Debut 
Hide <--RelatedTo--> Run <--RelatedTo--> Spring <--Synonym--> Impulse <--Synonym--> Stimulus 