Allegation is a type of Claim. Claim is related to Take. Take is a synonym of Convey. 
you are likely to find Curtain in/at/on Opera. Curtain is related to Stage. 
Allegation --IsA--> Claim <--RelatedTo--> Take <--Synonym--> Convey 
Opera <--AtLocation-- Curtain <--RelatedTo--> Stage 