Download Error- wmt14_translate/de-en Dataset

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Short description
Download Error- wmt14_translate/de-en Dataset

Environment information

• Operating System: Windows 10

• Python version: 3.8

• tensorflow-datasets/tfds-nightly version: 4.5.2

• tensorflow/tf-nightly version: 2.4.0-rc0

• Does the issue still exists with the last tfds-nightly package (pip install --upgrade tfds-nightly) ?

Reproduction instructions

import tensorflow_datasets as tfds
examples, metadata = tfds.load('wmt14_translate/de-en', with_info=True,
                               as_supervised=True)

Link to logs
DownloadError: Failed to get url https://www.statmt.org/wmt13/training-parallel-commoncrawl.tgz. HTTP code: 503.

Expected behavior
DownloadError:

Additional context
if I put the link into my browser, the zip file begins downloading without issue.

Start by rerunning the provided tfds.load('wmt14_translate/de-en', ...) example with the listed TensorFlow Datasets and TensorFlow versions, then inspect the DownloadError for the statmt.org URL returning HTTP 503. Check whether the failure is reproducible outside the browser and determine what behavior should be considered done for this dataset download.