Assertion: mustard gas's effect | /r/HasProperty | devastating
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Source sentences:
text: I (1914–1918), when it was distributed with devastating effect near Ypres in Flanders (Belgium) on July 12, 1917.
text: Mustard gas and other chemical agents were used with devastating effects during World War I, resulting in casualties numbering around 100,000 and around a million injuries to civilians and soldiers.
text: I, when it was distributed with devastating effect near Ypres in Flanders on July 12, 1917.