21.   It was an unfortunate thing.

22.   James Lindsay, a senior fellow at the Brookings Institute in Washington, said the unfortunate thing about unexpected change is that it can also cut the other way.

23.   The unfortunate thing is these planes have come down to the ground.

24.   The unfortunate thing is these planes have to come down to the ground.

25.   The unfortunate thing for her is the timing of it, and that has made it a major case.

26.   The unfortunate thing is that innocent people are being killed.