conversations.from: human
conversations.value: Ralph has a record store where people can trade their own records for new ones. People can trade 2 old records for 1 new one. 5 people come in with old records and leave with 7 new records between them. How many old records did the 5 people bring in?
conversations.from: assistant
conversations.value: People can bring in 2 old records = get 1 new record.
  5 people come in with old records and leave with 7 new records, 7 new records x 2 old records traded for each = 14 old records that the 5 people brought in.