article_snippet.sent: Historians estimate that more than 1million soldiers were exposed to gas.
article_snippet.sent: Around 150,000 chemical casualties were reported.
article_snippet.sent: Historians estimate that more than 1million soldiers were exposed to gas — and 90,000 killed. '
article_snippet.sent: A lot of the effects did not kill you but more than 1million soldiers were exposed to gas — and 90,000 killed were lasting.
highlights_snippet.sent: Around one million soldiers were exposed to gas and 90,000 killed .
  