The quarantine flags were raised to indicate a potential health risk.

There are many blue flags flying on the beach.

There were several yellow flags at the beach to warn swimmers of dangerous conditions.

The race ended with the waving of checkered flags.

The corner flags were placed at each corner of the soccer field.

They proudly waved their freak flags at the music festival.

The parade was filled with rainbow flags.

His suspicious behavior raised flags among the other employees.

The museum displayed several apartheid flags.

The house flags were proudly displayed on the ship.