Handling some special values when transforming response data into list(issue #3573)

[petyaslavova]

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Description of change

Handling some special values when transforming response data into list (fix for issue #3573 )

In the current implementation of the postprocessing callback we try to convert the returned values directly to ints and then to floats.
The problem is that for some words, conversion to float succeeds, but they might be intended to be normal words - like infinity, or nan (which can be an abbreviation for an airport).