conversations.from: human
conversations.value: Explain how to solve this math problem: There were sweets on the table. Jack came and took half of all the candies and 4 more candies. Then Paul came and took the remaining 7 sweets. How many sweets were on the table at first?
conversations.from: assistant
conversations.value: Jack took 4 more candies than the half, and Paul took the rest, which means 7 + 4 = 11 candies were half of all candies.
  That means at first there were 11 * 2 = 22 candies.