comment_001:
  comments: text for cooment 001
  commented_type: Question
  commented_id: 1
  author_id: 1
comment_002:
  comments: text for cooment 002
  commented_type: Question
  commented_id: 2
  author_id: 1
comment_003:
  comments: text for cooment 003 (comment for answer!)
  commented_type: Question
  commented_id: 5
  author_id: 1