Hint is a type of Clue. Hint is a synonym of Suggest. Suggest is a synonym of Move. Move is related to Leave. 
Action is related to Shot. Shot is related to Vaccine. 
Clue <--IsA-- Hint <--Synonym--> Suggest <--Synonym--> Move <--RelatedTo--> Leave 
Action <--RelatedTo--> Shot <--RelatedTo--> Vaccine 