¿Que pasó el año anterior de 2015?

"Results": [
    {
        "Text": "año",
        "Start": 13,
        "End": 16,
        "TypeName": "datetimeV2.daterange",
        "Resolution": {
            "values": [
                {
                    "timex": "2018",
                    "type": "daterange",
                    "start": "2018-01-01",
                    "end": "2019-01-01"
                }
            ]
        }
    },
    {
        "Text": "anterior de 2015",
        "Start": 17,
        "End": 33,
        "TypeName": "datetimeV2.daterange",
        "Resolution": {
            "values": [
                {
                    "timex": "2015",
                    "Mod": "before",
                    "type": "daterange",
                    "sourceEntity": "datetimerange",
                    "end": "2015-01-01"
                }
            ]
        }
    }
]