{
  "id": 1855,
  "title": "no impression col in test dataset?",
  "url": "/competitions/kddcup2012-track2/discussion/1855",
  "author_name": "yesorno",
  "post_date": "2012-05-04T12:17:02.417000",
  "votes": 0,
  "comment_count": 0,
  "views": 1492,
  "content": "<p>Hi, there is no impression col in test dataset.</p>\r\n<p>I think it is an important feature to predict the CTR.</p>",
  "messages": [
    {
      "id": 10791,
      "postDate": "2012-05-04T12:17:02.417Z",
      "content": "<p>Hi, there is no impression col in test dataset.</p>\r\n<p>I think it is an important feature to predict the CTR.</p>"
    }
  ],
  "comments": [],
  "raw_markdown_by_id": {
    "10791": ""
  }
}