If you want to jump straight to trying it, you can preview it here:
Try clicking the play button at the bottom right of workflow pane that appears next to the big blue text.
Clicking each node after you submit your query shows you its results for the run.
Full-screening the experience (icon on the top right) and expanding a node (same icon within a step of the workflow) lets you train that prompt in the same way we did in the demo.
The first node (“User Intent Extractor”) is purposefully vague so you can train it yourself!