Assertion: pbm format | /r/HasProperty | invented by jef poskanzer
Facets:
value: as a format
type: MANNER
value: in the 1980s
type: TEMPORAL
Source sentences:
text: The PBM format was invented by Jef Poskanzer in the 1980s as a format that allowed monochrome bitmaps to be transmitted within an email message as plain ASCII text, allowing it to survive any changes in text formatting.