conversations.from: human
conversations.value: Can you break down the solution for me for this math problem: In 6 months Bella and Bob will be celebrating their 4th anniversary.  How many months ago did they celebrate their 2nd anniversary?
conversations.from: assistant
conversations.value: First, we find their current point in time be realizing that 4 years is 4 sets of 12 months, meaning at that anniversary they will have been together 4*12=48 months
  Then, we subtract their 6 month difference, finding they are at 48-6=42 months into their relationship.
  Since 2 years would be 2*12=24 months into the relationship.
  We take the larger number, 42, and subtract the smaller number, 24 to find the difference in months, meaning it is 42-24= 18 months