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.
“Need a climate-controlled 10x15 starting the 1st. Moving out of my apartment in Auburn Bay.”
“Renovating the kitchen, need a 10x10 unit for about 3 months.”
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.