Pdf extraction variable error

i am trying to extract some values from pdf files while providing details of variable i am facing some issues,please look image below.

Could you try with
ClassificationResult.First()

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ohh yes error has gone but i want to know about “first” keyword,when it is used?

Returns the first element in a sequence that satisfies a specified condition

For more info on ClassificationResult Class, you can refer to the Doc

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thnks buddy

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