Assertion: folk music's root | /r/HasProperty | variant
Facets:
value: specifically
type: MANNER
Source sentences:
text: Ironically, the roots of the British Invasion were in American folk, specifically a variant known as skiffle as popularized by Lonnie Donegan; however, most of the British Invasion bands had been extensively influenced by rock and roll by the time their music had reached the United States and bore little resemblance to its folk origins.