Assertion: nerve agent | /r/HasProperty | developed
Facets:
value: just before
type: TEMPORAL
Source sentences:
text: They were developed just before and during World War II and are related chemically to the organophosphorus insecticides.
text: Since then, other nerve agents have been developed, but much less is known about them, although they are thought to work in broadly the same way.
text: Since then, other nerve agents have been developed, but much less is known about them, although they are thought to work in broadly the same way.
text: Since then, other nerve agents have been developed, but much less is known about them, although they are thought to work in broadly the same way.