From en.wikipedia.org:
[yellow flag] [yellow flags] YELLOW FLAG may refer to:
- _Iris pseudacorus_ , an aquatic flowering plant - A flag of a yellow colour: - Yellow flag (contagion) , historically displayed on ships to indicate the presence of disease or quarantine (obsolete); also used in some cities to mark a recent death in a neighborhood, regardless of cause - Racing flags , used in motor sports to indicate hazardous conditions - Penalty flag , used in various sports including American football - Yellow Flag Line , transport on the Chao Phraya River, with service indicated by the flag color - Yellow Dragon Flag , the flag of the Qing dynasty - Yellow Jack (flag) , the signal flag that represents the letter Q - A political flag used to represent liberalism or capitalism ( _cf._ red flag , black flag ) - _The Yellow Flag_ , 1937 German drama film - Yellow Banners of the Eight Banner system - Plain Yellow Banner - Bordered Yellow Banner [disambiguation]
Flag, yellow