11.   Anyone who does contract the illness may not even know it until returning home, since the incubation period is seven to nine days.

12.   As they point out, the National Bureau of Economic Research does not know until months after the fact whether the economy is in recession.

13.   Because of a court-ordered redistricting plan that rearranged the Texas political map, final results in some Texas congressional races may not be known until December.

14.   Because of the fast pace of the job- cutting, he said, the detailed plans for individuals were not known until very recently.

15.   A raging controversy broke out during the game, although nobody knew it until after it was over.

16.   Additionally, DeLaria has been primarily known until now for her work as a comedian and singer in gay and lesbian theater.

17.   All of them knew of the Holocaust, but none of them believed what he knew until it was too late.

18.   Brothers and sisters struggled to identify adults they knew until now only as children.

19.   But Azmi was not assigned to a team, and his next destination will not be known until draft day.

20.   But surveying likely voters is also hard, because no one knows until Election Day who will really vote.