anchor.diff:  {
     "query": {
       "query_string": {
  -      "query": "john smith 1970"
  +      "query": "john smith new york"
       }
     }
   }
  
positive.code: 
  [source,js]
  --------------------------------
  GET _search?q=john+smith+1970
  --------------------------------
  
  Other queries, such as the <<query-dsl-match-query,`match`>> and
  
negative.code: {
    "first_name":    "John",
    "last_name":     "Smith",
    "place_of_birth": "New York City"
  }
  
  GET my_index/_search
  {
    "query": {
      "match": {
        "_all": "john smith new york"
      }
    }
  }
  --------------------------------
  // CONSOLE
  <1> The `_all` field will contain the terms: [ `"john"`, `"smith"`, `"new"`, `"york"`, `"city"` ]
  
  [NOTE]
  .Only string values are added to _all
  =============================================================================
  
  If a `date_of_birth` field mapped as a date were used, or an `age` field that
  was an integer were added, they would not be included in the `_all` field, as
  `_all` only contains content from _string_ fields.
  
  It is important to note that the `_all` field combines the original values
  from each field as a string. It does not combine the _terms_ from each field.
  