Hi all
I'm wanting to create a dynamic segment for a load of leads we've imported from recent webinars.
However I'm struggling to get the query builder in the Dynamic Segment to show any results, and I don't understand the error it makes me satisfy.

It forces me to end the query with a contact record, but none of the prompts on the list show any results.
I've imported the webinar attendees as Leads in the Marketing app with the webinar name as the description field in the Lead. Ideally I'd like a segment for each of the webinars, using the description field contents as the key. As we re-run each webinar we'll add to that lead list and keep sending out mailings of interest.
Does anyone know what I need to put in the Entity field to make it work? My contact based segments are fine, and this is the first time we've done lead based ones.
Olly