"$query" : {
                                        "t" : {
                                                "$lt" : NumberLong(1317659606),
                                                "$gt" : NumberLong(1317400659)
                                        },
                                        "k" : {
                                                "$in" : [
                                                        "#rrhh",
                                                        "#empleo",
                                                        "#meintereso",
                                                        "#15mlliure",
                                                        "#uned"
                                                ]
                                        }
                                },
                                "$orderby" : {
                                        "t" : NumberLong(-1)
                                }
                        },