Here is an idea:

run it on old batches and see if you can predict which ones went on to raise a Series A, B, C or liquidity event.

Note: you might have to adjust for year since a Seed round in 2020 looks like a Series A in 2010.

Edit: I realize you have to figure out which companies raised out of 100s. As always, the data curation is harder than the algo. Not sure if techcrunch allows scraping.