code: def remove_doi_paragraph(tags):
      "Given a list of tags, only return those whose text doesn't start with 'DOI:'"
      p_tags = list(filter(lambda tag: not starts_with_doi(tag), tags))
      p_tags = list(filter(lambda tag: not paragraph_is_only_doi(tag), p_tags))
      return p_tagf remove_doi_paragraph(tags):
      "Given a list of tags, only return those whose text doesn't start with 'DOI:'"
      p_tags = list(filter(lambda tag: not starts_with_doi(tag), tags))
      p_tags = list(filter(lambda tag: not paragraph_is_only_doi(tag), p_tags))
      return p_tags
docs: Given a list of tags, only return those whose text doesn't start with 'DOI: