I want to display events attended by Salesforce contacts in a related list on the contact record. This event information will come from an external system - Eventsforce which is accessed via REST API.

In order to match the salesforce contact record, with the associated Eventsforce contact, I need to look up the attendees register, but to do this I need the eventID value which is stored in Eventsforce and not Salesforce.

The first query I can send gets me a list of all the events in Eventsforce, including the value in the eventID field.
https://www.eventsforce.net/jiscevents-sandbox/api/v2/events.json

The next query will get me all of the attendees for a given event. 
 https://www.eventsforce.net/jiscevents-sandbox/api/v2/events/eventID/attendees.json

But how do I get the value from the eventID field into my second query above, can Skuid do this? Is this unachievable without me loading the eventID values into Salesforce via another means?