Update cord.py

cord.py

@@ -52,7 +52,7 @@ class Cord(datasets.GeneratorBasedBuilder):
             features=datasets.Features(
                 {
                     "id": datasets.Value("string"),
-                    "tokens": datasets.Sequence(datasets.Value("string")),
+                    "words": datasets.Sequence(datasets.Value("string")),
                     "bboxes": datasets.Sequence(datasets.Sequence(datasets.Value("int64"))),
                     "ner_tags": datasets.Sequence(
                         datasets.features.ClassLabel(