1.   Nevertheless, the expulsion of a bishop was a relatively rare phenomenon.

2.   Planes have occasionally disappeared in midair, but this is a rare phenomenon.

3.   This is not a rare phenomenon.

4.   This will exclude the counter-examples, but it will also make knowledge a rare phenomenon at best.

5.   But they are rare phenomena in the chronically depressed neighborhoods of the inner cities.

6.   He is becoming a rare phenomenon in NASCAR, a driver who transcends the sport.

7.   Hubert S. Wilf, a mathematician at the University of Pennsylvania, said Rubel delighted in manufacturing examples of rare phenomena.

8.   In the city that produced Beame, all politics was Democratic, except for the rare phenomenon like John Lindsay.

9.   It now seemed clear that extra-solar planets are anything but a rare phenomenon.

10.   Multiple personality defenses have been a rare phenomenon to date nationwide, and there is no clear consensus in other state courts on how to address them.