Every form submission, in the person's own words, with where they came from. Label each one so tests are judged on good leads, not just more leads.
“Do you sell the parts? I want to do it myself.”
“Insurance adjuster already approved the claim, just need a contractor for patio doors.”
The AI labels every lead. “Needs review” means it was unsure, so a person decides; anyone can change any label. The AI reads the answers only, never names, emails or phone numbers.