1. An unknown number of demonstrators were arrested.

2. An unknown number of people were killed.

3. An unknown number of vaquita, probably in the hundreds, had already been lost.

4. On the other hand, an unknown number of heterosexuals do.

5. One teen-ager was reported killed, and an unknown number injured.

6. As many as 200 civilians and an unknown number of military personnel died during heavy fighting between government and rebel forces.

7. An unknown number of people died or were wounded in clashes with troops.

8. The unknown number can be calculated from the data.

9. The sign X stands for an unknown number.

10. " The letter " x'stands for an unknown number . "

11. Nine people have been killed and an unknown number of homes have been destroyed.

12. The state news agency Xinhua said an unknown number of residents were affected.

13. An unknown number of development processes that bridge known but uncontrolled processes are unidentified.

14. Alternatively, he could model the unknown number of branches using a loop activity, but the loop body is executed serially.

15. An unknown number of leafs are dancing in the breeze.

16. An unknown number of personnels are still trapped under the debris.

17. An additional, but unknown number of intersex conditions are not noticed at birth,(sentencedict.com) but are discovered later in life.

18. An unknown number of villagers and tourists lie under the rocks and mud, he says.

19. Six letters at the end of 47 and an unknown number of lines below are lost.

20. The conductor stated that there were 22 passengers inside the car and 33 outside, plus an unknown number of children.

21. The demonstrators attacked and burned buildings and cars; the soldiers responded by opening fire, killing an unknown number of demonstrators.

22. Present. Unascertained destroyed 36 vehicles, but the unknown cause of the incident, unknown number of casualties.