answer: #Person1# and #Person2# discuss a broken marriage.
documents: #Person1#: They got a divorce at last.
  #Person2#: It's inevitable. Their love was built on the sand, and this is why their marriage has landed on the rocks.
  #Person1#: You said it. Love builds on the sand will soon be on the rocks.
  #Person2#: That give us a good lesson.