Assertion: nitroglycerin | /r/HasProperty | shipped in the past
Facets:
value: often
type: TEMPORAL
Source sentences:
text: In the past, nitroglycerin was often shipped in the frozen state, but this resulted in a high number of accidents during the thawing process just before its use.
text: In the past, nitroglycerin was often shipped in the frozen state, but this resulted in a high number of accidents during the thawing process just before its use.