How to implement parent selector in sass?

Question

Sass

The question is dumb. Looked all over the manuals, but...
As in a Sass preprocessor, not Scss, it's important to implement this kind of css construct.
. Sel1 {
}
.sel>li {
}
.sel>li:hover {
}
If you separate the three rules, then how it turns out, but I can’t find inheritance (indentation).

Answer 1

.Sel1 {
  &>li {
    &:hover {
     }
  }
}

Answer 2

.sel
    &1
     display: block

    > li
        display: block

        &:hover
            display: block