Assertion: phosgene | /r/HasProperty | prepared by a group of french chemists
Facets:
Source sentences:
text: The deficiencies of chlorine were overcome with the introduction of phosgene, which was prepared by a group of French chemists led by Victor Grignard and first used by France in 1915.
text: The deficiencies of chlorine were overcome with the introduction of phosgene, which was prepared by a group of French chemists led by Victor Grignard and first used by France in 1915.