Update dataset.py

dataset.py

@@ -41,7 +41,7 @@ class FeverDataset(GeneratorBasedBuilder):
             df = pd.read_csv(f, delimiter='\t')
             for idx, row in df.iterrows():
                 yield idx, {
-                    "query": row["col1"],
-                    "document": row["col2"],
-                    "spans": row["col3"],
+                    "query": row["query"],
+                    "document": row["document"],
+                    "spans": row["spans"],
                 }