Assertion: arsenic | /r/HasProperty | the agent
Facets:
value: in almost every instance
type: TEMPORAL
Source sentences:
text: Arsenic, Witthaus noted, of 19th century crime statistics has been "in almost every instance, the agent used by those who, having succeeded in a first attempt at secret poisoning, have seemed to develop a lust for murder and have continued to add to their victims until their very number has aroused suspicion and led to detection.