Assertion: nerve agent sarin | /r/ObjectUse | used in battle
Facets:
value: since december
type: TEMPORAL
value: in at least three syrian cities
type: LOCATION
Source sentences:
text: Ake Sellstrom’s confidential mission marked the first stage in a fledgling U.N. investigation into claims that the nerve agent sarin was used in battles in at least three Syrian cities since December .