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.
“Renovating the kitchen, need a parking for an RV for about 3 months.”
“Small business, need a 10x10 unit for inventory. Monthly is fine.”
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.