Greendale likely refers to green river valley -- i.e., Cairo 's Egyptian Islamic Jihad or the Islamic Group.

"Results": [
    {
        "TypeName": "LOC",
        "Text": "Cairo",
        "Start": 55,
        "End": 60
    },
    {
        "TypeName": "ORG",
        "Text": "Egyptian Islamic Jihad",
        "Start": 64,
        "End": 86
    },
    {
        "TypeName": "ORG",
        "Text": "Islamic Group",
        "Start": 94,
        "End": 107
    }
]