"Dynamic updating of :first-child and :last-child">
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  <p>This paragraph should be unstyled.</p>
  <p class="red">But this one should have a green background.</p>
  <p class="red">And this one should also have a green background.</p>
  <address>This address is only here to fill some space between two paragraphs.</address>
  <p>This paragraph should be unstyled.</p>
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