Don't add "Organized by" on external events
Title says it all. Most of the time, external events are not organized by PPBe (although they are sometimes co-organized by pirates). Having the sentence "organized by" is quite confusing then. Example : https://mastodon.pirateparty.be/@agenda/102033418029076796
In practice, this means that the software will have to display different texts according to the type of the event. This will requires a way for the bot's admin to indicate which type should or shouldn't display the "organized by" :/
An easy alternative could be to filter out the workgroups at the wiki parser level.