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.
“Second quote for patio doors. The first one came in high and I want to compare.”
“My landlord won't fix it. What are my rights here?”
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.