Assertion: polio | /r/CapableOf | reach epidemic proportions
Facets:
value: in the early 1900s
type: TEMPORAL
value: at a time
type: TEMPORAL
Source sentences:
text: Polio reached epidemic proportions in the early 1900s in countries with relatively high standards of living, at a time when other diseases such as diphtheria, typhoid, and tuberculosis were declining.