Assertion: retriever's popularity | /r/CapableOf | surge in 1970
Facets:
Source sentences:
text: Although the Golden Retriever was sought-after from the start, its popularity surged in the 1970s when President Gerald Ford introduced his dog, Liberty, to America.
text: Although the Golden Retriever was sought-after from the start, its popularity surged in the 1970s when President Gerald Ford introduced his dog, Liberty, to America.