Giant is a synonym of Vast. Vast is related to Fortune. Fortune is a type of Valuable. Valuable is related to Edition. 
Thanksgiving is related to Christmas. Christmas is related to Day. 
Giant <--Synonym--> Vast <--RelatedTo--> Fortune --IsA--> Valuable <--RelatedTo--> Edition 
Thanksgiving <--RelatedTo--> Christmas <--RelatedTo--> Day 