11.   At sea, a sailor can use one red and one yellow flag to signal other ships by holding the flags in different positions for different letters and numbers.

12.   A commemorative yellow flag might be appropriate.

13.   A few seconds later, he saw a yellow flag.

14.   A flurry of yellow flags flew.

15.   A novice fan can follow the leader without any problems if pit stops are made under yellow flag conditions.

16.   After the yellow flags, Michael Andretti was the most convincing early leader.

17.   But a yellow flag had fallen, denoting defensive holding by New York.

18.   But the yellow flags remained a problem for the Rams.

19.   Childress said that a yellow flag would allow enough time for a driver change without losing a lap.

20.   Each time, yellow flags would allow the rest of the field to catch up.