Assuming you're talking about the Data Type Parsing VIs in LabVIEW 2015 and later, you can read the documentation on them. Or you can watch my Hidden Gems presentation in which I describe some use cases for their predecessors, the VariantDataType VIs.
You have to disassemble the Variant. One option would be a Variant Tree indicator.
To get the actual values you can use the OpenG Variant Data tools:
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