BSARDRetrieval does not cover multi-article queries

[nikolay-banar]

Describe the bug

BSARDRetrieval does not cover multi-article queries and uses the last document from the list of relevant documents.

To reproduce

I believe that this snippet of code from BSARDRetrieval contains a bug:

for q in queries_raw:
    for doc_id in q["article_ids"]:
        self.relevant_docs[self.metadata.eval_splits[0]][str(q["id"])] = {
            str(doc_id): 1
        }

It uses only the last document from q["article_ids"], but it does not seem to be intended.

Additional information

No response

Are you interested to contribute a fix for this bug?

Yes

[Samoed]

Yes, this seems an issue. Would be great if you would fix it! You can create second version of dataset to not break compatibility