<search>
  <h2>Filter results</h2>
  <label for="search1">
    Search term
  </label>
  <input id="search1">
</search>

<search aria-labelledby="search_heading">
  <h2 id="search_heading">Filter results</h2>
  <label for="search2">
    Search term
  </label>
  <input id="search2">
</search>

<search aria-label="Filter results">
  <h2>Search</h2>
  <label for="search3">
    Search term
  </label>
  <input id="search3">
</search>