Attachment: Oversized guest-list calendar invite with purchase order lure

type.inbound
and strings.contains(body.current_thread.text,
                     '(Guest list is too large to display)',
                     '(Gästeliste zu groß zum Anzeigen)',
                     '(La liste des invités est trop longue pour être affichée)',
                     '(La liste des invités est trop importante pour être affichée)',
                     '(Список гостей слишком велик, невозможно отобразить его полностью)',
                     '(Elenco invitati troppo lungo per la visualizzazione)',
                     '(A lista de convidados é muito grande para ser exibida)',
                     '(Gæstelisten er for lang til at blive vist)'
)
and any(attachments,
        (
          .file_type == "ics"
          or .file_extension == "ics"
          or .content_type in ("application/ics", "text/calendar")
        )
        //
        // This rule makes use of a beta feature and is subject to change without notice
        // using the beta feature in custom rules is not suggested until it has been formally released
        //
        and any(beta.file.parse_ics(.).events,
                // purchase order key words
                any([.summary, .description],
                    any(ml.nlu_classifier(.).topics,
                        .name == 'Purchase Orders' and .confidence != 'low'
                    )
                )
        )
)
and not (
  sender.email.domain.root_domain in $high_trust_sender_root_domains
  and coalesce(headers.auth_summary.dmarc.pass, false)
)