Update files from the datasets library (from 1.6.0)

Release notes: https://github.com/huggingface/datasets/releases/tag/1.6.0

natural_questions.py

@@ -16,26 +16,16 @@
 # Lint as: python3
 """Natural Questions: A Benchmark for Question Answering Research."""
 
-from __future__ import absolute_import, division, print_function
 
+import html
 import json
 import re
 
 import apache_beam as beam
-import six
 
 import datasets
 
 
-if six.PY2:
-    import HTMLParser as html_parser  # pylint:disable=g-import-not-at-top
-
-    html_unescape = html_parser.HTMLParser().unescape
-else:
-    import html  # pylint:disable=g-import-not-at-top
-
-    html_unescape = html.unescape
-
 _CITATION = """
 @article{47761,
 title	= {Natural Questions: a Benchmark for Question Answering Research},
@@ -149,7 +139,7 @@ class NaturalQuestions(datasets.BeamBasedBuilder):
                 ans_bytes = ans_bytes.replace(b"\xc2\xa0", b" ")
                 text = ans_bytes.decode("utf-8")
                 # Remove HTML markup.
-                text = re.sub("<([^>]*)>", "", html_unescape(text))
+                text = re.sub("<([^>]*)>", "", html.unescape(text))
                 # Replace \xa0 characters with spaces.
                 return {
                     "start_token": short_ans["start_token"],