How do I select the first adjacent sibling?

Question

I have an HTML list like so:

  
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Answer 1

The official CSS3 Spec does not currently support anything like this, though I do realize that it would be useful.

I would try doing searches for some pre-built JavaScript or jQuery scripts/libraries for adding CSS selectors. Although I have never come across anything.

If you do not find anything, you might as well just do it manually, or try finding a completely different solution.