Assertion: mold | /r/SimilarTo | stain
Facets:
value: often
type: TEMPORAL
value: to a surface
type: LOCATION
Source sentences:
text: They can be white, black, yellow, blue, or green and often look like discoloration or stain to a surface.
text: Mold is also found in damp building materials where it often appears like stains and comes in a variety of colours.