11.  The saddest part of this is I adore cats!

12.  What caused the stenosis to flare up now might be the saddest part of what has been a sad year for the Ripkens.

13.  Which is, of course, the saddest part.

14.  The saddest part, perhaps, is that some of them, like the egg collectors, are working within programmes originally implemented to protect the turtles.

15.  The saddest part was that she could not communicate her feelings to others.

16.  People are forgetting him -- this is the saddest part.

17.  That was the saddest part of all.