Assertion: mustard gas | /r/HasProperty | developed by césar-mansuète despretz
Facets:
value: possibly
type: DEGREE
Source sentences:
text: Mustard agent was possibly developed as early as 1822 by César-Mansuète Despretz (1798–1863).
text: Mustard agent was possibly developed as early as 1822 by César-Mansuète Despretz (1798–1863).
text: Mustard agent was possibly developed as early as 1822 by César-Mansuète Despretz (1798–1863).