11.   A British Rail spokesman said they had an eye-witness who confirmed the warning signals were working properly.

12.   That was the cue for Spartak to post the warning signals with a series of slick attacks.

13.   An exerciser should recognize dizziness, shortness of breath, nausea, tingling and goose bumps as dehydration warning signals.

14.   Another warning signal was a report of an unexpected jump in unemployment.

15.   As a result, it is inevitable that the Iran decision will be interpreted by many as a warning signal from Tokyo.

16.   As much as the injuries have hurt, many of those players already had medical histories that sent off warning signals.

17.   Above normal rates can serve as a warning signal to physicians, he said.

18.   Already there are early warning signals, as political cartoons in newspapers across the country bashed Gates last week.

19.   But rather than a milepost to glory, the trials served as a warning signal of the roadblock that lay ahead.

20.   But there were warning signals that Penn Ship might run into trouble, he said.