11.   All the examples involve writing a page on volcanoes, but they work for any subject.

12.   Of course these two examples involve listening to poetry, not reading it.

13.   Of course, those two examples involve prerecorded material.

14.   One extreme example involved a retired college professor who had had a stroke.

15.   One example involved overseas ballots delivered by FedEx or other commercial express mail services.

16.   One recent example involved foreign aid.

17.   One such example involves no less an innovation than the World Wide Web.

18.   One such example involves Scotts Co., a fertilizer maker, which ITT bought after its shares had tumbled in response to news of bad earnings.

19.   One recent example involved a large, very reputable firm that wanted the business school to develop and administer a program for its entry-level employees.

20.   The best examples involve umbrella volunteer organizations that have competed against the right-wingers in California for years.