Assertion: postcard | /r/CapableOf | become popular
Facets:
value: around the world
type: LOCATION
Source sentences:
text: The most notable printer of this period was Curt Teich & Co., which printed its first linen card in 1931, and whose postcards became popular around the world.
text: This time period, between 1907 and 1915, was when postcards really took off and became popular.