Simple POC follows. The trick is referencing the data correctly in the loop (value.foo) and convincing ChatGPT to give you a simple output which you can further parse once the loop is done (I ended up with an array of arrays, which I could then further parse into a database record):
POC: For each database record consisting of a key and a date, get the name of a famous person born on that date in a previous year.
Awesome, thanks for your help. i got it working. The thing which threw me off was that on hover the {{value.something}} gave "not defined", but it still seems to work. I should have know to check the JSON-tab.