title: How to copy some ElasticSearch data to a new index
body: <p>Let's say I have movie data in my ElasticSearch and I created them like this:</p>
  
  <pre><code>curl -XPUT "http://192.168.0.2:9200/movies/movie/1" -d'
  {
      "title": "The Godfather",
      "director": "Francis Ford Coppola",
      "year": 1972
  }'
  </code></pre>
  
  <p>And I have a bunch of movies from different years.  I want to copy all the movies from a particular year (so, 1972) and copy them to a new index of "70sMovies", but I couldn't see how to do that.</p>