executed<-
executed(entity)<-list(entity1, entity2, entity3)
executed(entity)<-c(entity1, entity2, entity3)
executed(activity)<-list(entity1, entity2, entity3)
executed(activity)<-c(entity1, entity2, entity3)
activity$executed<-list(entity1, entity2, entity3)
activity$executed<-c(entity1, entity2, entity3)storeEntity is called.)  To set the non-executed Entities, see used.