Anniversary is related to Birthday. Birthday is the opposite of Half. Half is related to Snap. 
you are likely to find Bone in/at/on Fish. Fish is a type of Food. Food is related to Gather. Gather is a synonym of Assemble. 
Anniversary <--RelatedTo--> Birthday <--Antonym--> Half <--RelatedTo--> Snap 
Bone --AtLocation--> Fish --IsA--> Food <--RelatedTo--> Gather <--Synonym--> Assemble 