Assertion: nerve agent | /r/HasProperty | the worst such attack
Facets:
value: anywhere in the world
type: LOCATION
value: in the past 25 years
type: TEMPORAL
Source sentences:
text: Chemical weapons specialists, who have studied footage showing the dead and dying victims of the attack, said several symptoms offered strong evidence that a nerve agent was used; it would be the worst such attack anywhere in the world in the past 25 years.