conversations.from: human
conversations.value: The sum of Mario and Maria's ages now is 7. Mario is 1 year older than Maria. How old is Mario?
conversations.from: assistant
conversations.value: If x is Maria's age, then Mario's age is x + 1.
  The equation that represents the sum of their ages is x + x + 1 = 7.
  By combining like terms, the equation becomes 2x = 6.
  Hence, the value of x which represents the age of Maria is 6/2=3.
  So Mariu is 3 + 1 = 4 years old.