11.   They learn debate in school and at Oxford and Cambridge, whose debating unions have spawned whole generations of irascibly close-knit legislators.

12.   This, in turn, has spawned a generation of amateur competitions, aimed at instructors, while the professional contests are taken over by gymnasts.

13.   For decades, that one sample can spawn subsequent generations of the same anthrax strain.

14.   While some argue that Britain has spawned a generation of young hooligans, crime statistics are contradictory.