<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def get_authors(self, entry):
 """ Return the authors in HTML. """

        try:
            return format_html_join(
                ', ', '<a href="{}" target="blank">{}</a>',
                [(author.get_absolute_url(),
                  getattr(author, author.USERNAME_FIELD))
                 for author in entry.authors.all()])
        except NoReverseMatch:
            return ', '.join(
                [conditional_escape(getattr(author, author.USERNAME_FIELD))
                 for author in entry.authors.all()])