Assertion: topic | /r/CapableOf | fall in popularity
Facets:
value: from 1991
type: TEMPORAL
Source sentences:
text: Griffiths & Steyvers used topic modeling on abstracts from the journal PNAS to identify topics that rose or fell in popularity from 1991 to 2001 whereas Lamba & Madhusushan  used topic modeling on full-text research articles retrieved from DJLIT journal from 1981–2018.