Assertion: cube | /r/HasProperty | popular
Facets:
value: extremely
type: DEGREE
value: during the 1980s
type: TEMPORAL
Source sentences:
text: In the 1980's Rubik's cube was so popular that it was simply called "the cube".
text: The cube was extremely popular during the 1980s, and at its peak between 1980 and 1983, 200 million cubes were sold world wide.