Though I am loathe to quote other writers at legnth in this space, this little bit from Dan Froomkin 's "White House Briefing" column in the WashPost today is just too good to pass up (read the whole column here ):

"Results": [
    {
        "TypeName": "PER",
        "Text": "Dan Froomkin",
        "Start": 88,
        "End": 100
    },
    {
        "TypeName": "LOC",
        "Text": "White House",
        "Start": 105,
        "End": 116
    },
    {
        "TypeName": "ORG",
        "Text": "WashPost",
        "Start": 141,
        "End": 149
    }
]