Premise: Punk rock ( or simply `` punk '' ) is a rock music genre that developed in the early to mid-1970s in the United States , United Kingdom , and Australia . Rooted in 1960s garage rock and other forms of what is now known as `` proto-punk '' music , punk rock bands rejected perceived excesses of mainstream 1970s rock . By the 1990s , punk rock had re-emerged in the mainstream , as pop punk bands such as Green Day and the Offspring brought the genre widespread popularity .
Hypothesis: Punk rock is a genre of rock.
Label: ENTAILMENT