Please identify all the named entities mentioned in the input sentence provided below. Use only the categories: PER - person, ORG - organization, and LOC - location.
Remember, nationalities are neither locations nor organizations, and organizations can represent other groups of people.
Pay attention to the provided example. You should only output the results in JSON format, following a similar structure to the example result provided.

Example sentence and results:

Where in the world is Iguazu?

"Results": [
    {
        "TypeName": "LOC",
        "Text": "Iguazu",
        "Start": 22,
        "End": 28
    }
]

Considering the input sentence below, what is the output result?

Having spoken with Dennis Goldmann, I am advised that there are currently 2 Guaranties in place in the sum of $8M each: one by Niagara Mohawk Holdings Inc f/b/o Enron, and one by Enron Inc. f/b/o Niagara Mohawk Energy Marketing.


"Results": [
    {
        "TypeName": "PER",
        "Text": "Dennis Goldmann",
        "Start": 19,
        "End": 34
    },
    {
        "TypeName": "ORG",
        "Text": "Niagara Mohawk Holdings Inc",
        "Start": 127,
        "End": 154
    },
    {
        "TypeName": "ORG",
        "Text": "Enron",
        "Start": 161,
        "End": 166
    },
    {
        "TypeName": "ORG",
        "Text": "Enron",
        "Start": 161,
        "End": 166
    },
    {
        "TypeName": "ORG",
        "Text": "Niagara Mohawk Energy Marketing",
        "Start": 196,
        "End": 227
    }
]