fix: drop questions with empty candidates

README.md

@@ -59,15 +59,15 @@ This new version introduces several key improvements over the original EusExams
 - **New Data**: Added the 2026 health exams in Spanish, which accounts for the larger discrepancy in size between the `es` and `eu` subsets in the `health` category.
 
 ## Dataset Statistics
-The dataset contains a total of **27,442** unique questions, distributed across the two languages and domains as follows:
+The dataset contains a total of **27,096** unique questions, distributed across the two languages and domains as follows:
 
 | Domain | Spanish (`es`) | Basque (`eu`) |
 | :--- | :--- | :--- |
 | **Council** | 928 | 895 |
 | **Government** | 2,530 | 2,531 |
-| **Health** | 11,387 | 6,351 |
+| **Health** | 11,387 | 6,005 |
 | **University** | 1,459 | 1,361 |
-| **Total** | **16,304** | **11,138** |
+| **Total** | **16,304** | **10,792** |
 
 - **Curated by:** HiTZ Research Center & IXA Research group (University of the Basque Country UPV/EHU)
 - **Language(s) (NLP):** Basque (eu)