conversations.from: human
conversations.value: Find the answer to this math problem: Ava planted 9 apple trees in her backyard. That's 3 more than Lily planted in her backyard. How many apple trees did they plant in their backyards collectively?
conversations.from: assistant
conversations.value: Lily planted 9-3 = 6 apple trees in her backyard.
  They planted 9+6 = 15 apple trees in their backyards collectively.