I want to use a More like this query in Elastic Search to find similar documents. However I need to filter the documents on which the query is executed.

Example below: I want to find blog items that are similar to blog with id 123456, but written by author 120 or author 123.

When executing this query, I get back similar blogs from ALL authors and thus not filtered ...

```
{
  "query":{
    "more_like_this" : {

        "fields" : ["body" ],  
        "docs" : [
              {
                "_id" : "123456"
              }
            ],
        "percent_terms_to_match" : 0.4,
            "min_term_freq" : 1
      }
  }
 },

"filter":{
  "and":[            
          {
            "type":{ "value":"blog" }
          },
          {
            "terms":{ "authorId": ["120", "123"] }
          }
        ]
}
}

```