The meaning of "갑돌이가 울면서 떠나는 갑순이를 배웅했다"?

Without commas there are two possible meanings to the sentence. Here is the sentence with the meanings clarified by commas:

• 갑돌이가 울면서, 떠나는 갑순이를 배웅했다.
  A weeping Kap Doli saw off Kap Suni, who was leaving.
• 갑돌이가, 울면서 떠나는 갑순이를 배웅했다.
  Kap Doli saw off a weeping Kap Suni, who was leaving.

Of course, in spoken Korean, there would be pauses in place of the commas.