Assertion: hydrocyanic acid | /r/ObjectUse | used for month
Facets:
Source sentences:
text: He returned to this theme at the end of his speech: Hydrocyanic acid does not leave such deep, indelible traces unless it has been used for months and months so that it penetrates deep into the walls.
text: He returned to this theme at the end of his speech: Hydrocyanic acid does not leave such deep, indelible traces unless it has been used for months and months so that it penetrates deep into the walls.