Assertion: flip chart | /r/AtLocation | use
Facets:
value: from the 1900s
type: TEMPORAL
Source sentences:
text: Flip charts have being in use from the 1900s, the earliest recorded use of a flip chart is a photo from 1912 of John Henry Patterson (1844-1922), NCR’s CEO while addressing the 100 Point Club standing next to a pair of flip charts on casters.