Premise: A girl group is a music act featuring several female singers who generally harmonize together . The term `` girl group '' is also used in a narrower sense in the United States to denote the wave of American female pop music singing groups , many of whom were influenced by doo-wop , and which flourished in the late 1950s and early 1960s between the decline of early rock and roll and start of the British Invasion . Girls ' Generation , also known as SNSD , is a South Korean girl group formed by S.M. Entertainment .
Hypothesis: Girls' Generation is a singing group of girls.
Label: ENTAILMENT