Assertion: inorganic arsenic | /r/HasProperty | recognized as human poison
Facets:
value: since ancient times
type: TEMPORAL
Source sentences:
text: Inorganic arsenic has been recognized as a human poison since ancient times, and large oral doses (above 60,000 ppb in water which is 10,000 times higher than 80% of U.S. drinking water arsenic levels) can result in death.