title: LUIS buitin datetime.v2 entity unable to parse daterange type of values
body: <p>I have used pre-built datetime.v2 entity to handle all my datetime related stuff in LUIS.</p>
  
  <p><strong>I have this utterance: <code>March to June 2017</code></strong></p>
  
  <p>The expected output from LUIS should be, in the entities:</p>
  
  <pre><code>"resolution": {
          "values": [
            {
              "timex": "XXXX-03",
              "type": "daterange",
              "start": "2017-03-01",
              "end": "2017-06-01"
            }
          ]
        }
  </code></pre>
  
  <hr>
  
  <p>But this is what I am getting when I query LUIS:</p>
  
  <pre><code>{
    "query": "march to june 2017",
    "topScoringIntent": {
      "intent": "TestIntent",
      "score": 1.0
    },
    "intents": [
      {
        "intent": "TestIntent",
        "score": 1.0
      },
      {
        "intent": "None",
        "score": 0.05487651
      }
    ],
    "entities": [
      {
        "entity": "march",
        "type": "builtin.datetimeV2.daterange",
        "startIndex": 0,
        "endIndex": 4,
        "resolution": {
          "values": [
            {
              "timex": "XXXX-03",
              "type": "daterange",
              "start": "2017-03-01",
              "end": "2017-04-01"
            },
            {
              "timex": "XXXX-03",
              "type": "daterange",
              "start": "2018-03-01",
              "end": "2018-04-01"
            }
          ]
        }
      },
      {
        "entity": "june 2017",
        "type": "builtin.datetimeV2.daterange",
        "startIndex": 9,
        "endIndex": 17,
        "resolution": {
          "values": [
            {
              "timex": "2017-06",
              "type": "daterange",
              "start": "2017-06-01",
              "end": "2017-07-01"
            }
          ]
        }
      }
    ]
  }
  </code></pre>
  
  <hr>
  
  <p>I have written the following C# code, to query the date range in my LUIS intent</p>
  
  <pre><code>        [LuisIntent("TestIntent")]
          public async Task TestIntentHandler(IDialogContext context, LuisResult result)
          {
              EntityRecommendation dateTimeEntity, dateRangeEntity;
              if(result.TryFindEntity("builtin.datetimeV2.date", out dateTimeEntity))
              {
                 var s = dateTimeEntity.Resolution.Values.Select(x =&gt; x).OfType&lt;List&lt;object&gt;&gt;().SelectMany(i =&gt; i).ToList();
              }
              if(result.TryFindEntity("builtin.datetimeV2.daterange", out dateRangeEntity))
              {
                  var s = dateRangeEntity.Resolution.Values.Select(x =&gt; x).OfType&lt;List&lt;object&gt;&gt;().SelectMany(i =&gt; i).FirstOrDefault();
                  var type = s.GetType();
              }
          }
  </code></pre>
  
  <p>Can anyone tell me how to query the range of months like the above utterance in LUIS using the prebuilt datetime.v2 type of entity.</p>