Fix task tags

README.md

@@ -13,13 +13,13 @@ size_categories:
 - 10K<n<100K
 source_datasets: []
 task_categories:
-  - text-classification
-  - structure-prediction
-  - text-classification
+- text-classification
 task_ids:
-  - multi-class-classification
-  - named-entity-recognition
-  - parsing
+- multi-class-classification
+- named-entity-recognition
+- parsing
+tags:
+- structure-prediction
 ---
 
 # Dataset Card for sd-nlp