Generated by SassMeister.com.

SassMeister-input.sass

// ----
// Sass (v3.3.8)
// Compass (v1.0.0.alpha.19)
// ----

.grid-inner address
    @extend #tiles li .overview p
.grid-inner address:before
    content: "~ "

#tiles li
    .overview
        background-color: rgba(0, 0, 0, 0.5)
        color: #eeeeee
        width: 280px
        height: 150px
        position: absolute
        bottom: 0
        right: 0
        padding: 10px
        h2, h3, p
            margin: 0
            overflow: hidden
            text-overflow: ellipsis
            white-space: nowrap
    &:first-child, &:nth-child(4)
        left: 0 !important
    &:last-child, &:nth-child(3)
        left: 815px !important

SassMeister-output.css

Can't extend #tiles li .overview p: can't extend nested selectors