11.   Still, we had a nagging sense that we were missing something.

12.   The challenge is overcoming that nagging sense that old ideas are merely being reworked, that sense of muddling along.

13.   They often feel a nagging sense of being isolated and unloved.

14.   Yet there is a nagging sense among some veterans that the years of sacrifice and pain have not been appreciated.

15.   Yet she misses her baby during the day and has a nagging sense that it would be better for both of them if she only worked part time.

16.   Part of what drove her to activism was the nagging sense that Israel had become trapped in a needless cycle of violence.