Assertion: country music's artist | /r/CapableOf | start to become successful
Facets:
value: highly
type: DEGREE
Source sentences:
text: Artists like Ed Sheeran, Adele, Ellie Goulding, Sam Smith, Jessie J, and Emeli Sandé from the U.K. started to become highly successful and gained popularity from crossover hits in the U.S..