What are good IDs for the heading elements?

"movie", "subtitle", "cinema""movie", "movie", "cinema""title", "title", "title"h1, h1, h3<html>
<body>
  <h1 id="movie">Avengers:</h1>
  <h1>Infinity War</h1>
  <h3 id="now">Now in cinemas</h3>
</body>
</html>
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Make sure to pick "movie", "subtitle", "cinema", since we need to give it a unique IDs.