text: use mydb85
  
  var author =
  {
      "name": "Herge",
      "nationality": "Belge"
  }
  
  db.authors.save(author)
  
  var author1 = db.authors.findOne()
  
  var book = {
  "_parentId": author1._id,
  "name": "Titin au Congo",
  "genre": "Bande dessinee",
  "publisher": "Herge"
  }
  
  db.books.save(book)