Text: As it has since the '60s, edgy rock coexists with more easygoing  In the mid-'60s, the best-selling albums included Herb Albert and the Tijuana Brass ' Whipped Cream and Other Delights.
Entailment: Edgy rock co-existed in the '60s with easygoing music.
Contradiction: Only one type of music existed in the '60s.