Assertion: rubber's use | /r/CapableOf | become widespread
Facets:
value: in the early 1970s
type: TEMPORAL
value: in canada
type: LOCATION
value: in the u.s.
type: LOCATION
Source sentences:
text: The use of AstroTurf and similar surfaces became widespread in the U.S. and Canada in the early 1970s, installed in both indoor and outdoor stadiums used for baseball and football.