conversations.from: human
conversations.value: Can you guide me through solving this problem: TJ ran a 10K race last Saturday. He ran the first half in 20 minutes. He completed the second half in 30 minutes. What was his average time per kilometer?
conversations.from: assistant
conversations.value: He ran the 10 kilometers in a total of 20 + 30 = 50 minutes.
  Therefore, he ran at a pace of 50 minutes / 10 kilometers = 5 minutes per kilometer.