Assertion: biological warfare's use | /r/CapableOf | take three major forms
Facets:
value: before the 20th century
type: TEMPORAL
Source sentences:
text: Before the 20th century, the use of biological agents took three major forms:
text: Before the 20th century, the use of biological agents took three major forms,
text: Before the 20th century, the use of biological agents took three major forms: