Assertion: sarin's use | /r/AtLocation | the 1995 tokyo subway attack
Facets:
value: previously
type: TEMPORAL
Source sentences:
text: Perhaps the best-known recent use of sarin previously was in the 1995 Tokyo subway attack – known in Japan as the Subway Sarin Incident – in which members of a domestic cult-turned-terrorist group punctured bags of liquid sarin with sharpened umbrella tips in subway cars.