code: def _filter_and_clean(abstract, article):
      """Remove short article and clean up commas in abstract and article."""
      # a threshold is used to remove short articles with long summaries
      # as well as articles with no summary
      if len(abstract) < (0.75 * len(article)):
          # remove extra commas in abstracts
          abstract = abstract.replace(".,", ".")
          # remove extra commas in articles
          article = re.sub(r"[.]+[\n]+[,]", ".\n", article)
          return abstract, article
      else:
          return "", ""
  
file_path: datasets/tensorflow_datasets/summarization/wikihow.py
imports: import csv
  import os
  import re
  from etils import epath
  import tensorflow_datasets.public_api
label_desc: Use image node_id 1 for calling a global function with example usage: _filter_and_clean(abstract, article) and returns: abstract,  article, str,  str