$4b - Actual monthly cost of the US military presence in Iraq according to Secretary of Defence Rumsfeld in 2004.

"Results": [
    {
        "TypeName": "ORG",
        "Text": "US military",
        "Start": 33,
        "End": 44
    },
    {
        "TypeName": "LOC",
        "Text": "Iraq",
        "Start": 57,
        "End": 61
    },
    {
        "TypeName": "PER",
        "Text": "Rumsfeld",
        "Start": 96,
        "End": 104
    }
]