Assertion: milkweed's sap | /r/HasProperty | potential replacement
Facets:
value: for rubber
type: CAUSE
value: during world war
type: TEMPORAL
value: at a time
type: TEMPORAL
Source sentences:
text: During World War 2, the sap or latex from the plant was considered as a potential replacement for rubber at a time when the Japanese looked like taking control of the world’s rubber supply.