1.   A well-structured short answer is better than a weakly-structured long answer.

2.   That short answer gives rise to two further questions.

3.   The short answer is that nobody knows.

4.   The short answer is yes, some but not nearly enough.

5.   This type of question provides scope for responses which are more discursive than short answer but less open ended than the extended response variety.

6.   A short answer very much shorter answer is yes.

7.   Action on receipt of reply The circumstances in which searches are made and the variety of information elicited are too wide for a short answer.

8.   Sick, was the short answer.

9.   Another short answer.

10.   At least those would be the short answers to the where-do-they-come-from question.