.red { background-color : red }
p:not(:nth-of-type(3)) { background-color : lime }
dl > *:not(:nth-of-type(3n+1)) { background-color : lime }
.red { background-color : red }
p:not(:nth-of-type(3)) { background-color : lime }
dl > *:not(:nth-of-type(3n+1)) { background-color : lime }