updateed dataset features schema in README.md to match parquet files

README.md

@@ -29,15 +29,22 @@ dataset_info:
       dtype: string
     - name: text
       dtype: string
+    - name: source_type  
+      dtype: string     
     - name: spans
-      list:
-        - name: start
-          dtype: int64
-        - name: end
-          dtype: int64
-        - name: label
-          dtype: string
-  splits:
+      sequence:
+        feature: 
+          annotator:
+            dtype: string
+          end:
+            dtype: int64
+          label:
+            dtype: string
+          start:
+            dtype: int64
+          text:
+            dtype: string
+splits:
     - name: train
       num_examples: 19783
     - name: validation