standardize db ids

https://github.com/bigscience-workshop/biomedical/pull/748/files

ncbi_disease.py

@@ -230,14 +230,24 @@ class NCBIDiseaseDataset(datasets.GeneratorBasedBuilder):
                     # We need a unique identifier for this entity, so build it from the document id and entity id
                     unified_entity_id = "_".join([doc.pmid, entity.id, str(i)])
                     # The user can provide a callable that returns the database name.
-                    db_name = "omim" if "OMIM" in entity.id else "mesh"
+                    db_name = "OMIM" if "OMIM" in entity.id else "MESH"
+                    normalized = []
+
+                    for x in entity.id.split("|"):
+                        if x.startswith("OMIM") or x.startswith("omim"):
+                            normalized.append(
+                                {"db_name": "OMIM", "db_id": x.strip().split(":")[-1]}
+                            )
+                        else:
+                            normalized.append({"db_name": "MESH", "db_id": x.strip()})
+                    
                     unified_entities.append(
                         {
                             "id": unified_entity_id,
                             "type": entity.type,
                             "text": [entity.text],
                             "offsets": [[entity.start, entity.end]],
-                            "normalized": [{"db_name": db_name, "db_id": entity.id}],
+                            "normalized": normalized,
                         }
                     )