Assertion: tabun | /r/HasProperty | nerve gas
Facets:
Source sentences:
text: We can never be sure what might have happened if Tabun [nerve gas] had been used
text: In 1997, Nahum Manbar – an Israeli – was convicted of attempting to sell the technology and equipment necessary to produce mustard gas, as well as the knowledge necessary to produce tabun (a nerve gas), to Iran during the early 1990s.  
text: We can never be sure what might have happened if Tabun [nerve gas] had been used