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?

The most important question is n't whether Discovery is technically ready to fly with new safety features and emergency procedures, but whether the agency itself has learned from the crucial errors most common to Challenger and Columbia, errors that grew out of a management culture that discouraged criticism and sacrificed safety for image-puffing and budget-cutting.


"Results": []