Assertion: color yellow | /r/HasAspect | historical precedent
Facets:
value: as a color
type: OTHER
Source sentences:
text: In International maritime signal flags, plain yellow, green, and even black flags have been used to symbolize disease in both ships and ports, with the color yellow having a longer historical precedent, as a color of marking for houses of infection, previous to its use as a maritime marking color for disease.