PDF/File Parsing by copilot studio agent.

I have refered few youtube videos and articles on this, where the user uploads a pdf, the copilot agent should process it and do the necessary action. Below are the references.

https://youtu.be/I0TPj62Dhsc?si=ig5T3xapPKwl-fEi

https://learn.microsoft.com/en-us/answers/questions/2145101/how-to-access-user-uploaded-files-in-copilot-studi

https://learn.microsoft.com/en-us/answers/questions/2239946/how-to-access-and-extract-text-from-uploaded-files

(First( System.Activity.Attachments )).Content
for this i am getting null value or blank response

First( System.Activity.Attachments )
for this i am getting the below response>
{"Content":{"$kind":"FileDataValue","value":{"$kind":"ConversationFileReference","value":"3f5eac97-0eee-4020-9977-d34b3f8600bf"}},"ContentType":"application/pdf","Name":"rca1.pdf","Value":{"$kind":"FileDataValue","value":{"$kind":"ConversationFileReference","value":"3f5eac97-0eee-4020-9977-d34b3f8600bf"}}}

VarRecord: [{"Content":{"$kind":"FileDataValue","value":{"$kind":"ConversationFileReference","value":"42d41870-444c-44ad-9d5a-147f67b696b6"}},"ContentType":"application/pdf","Name":"rca1.pdf","Value":{"$kind":"FileDataValue","value":{"$kind":"ConversationFileReference","value":"42d41870-444c-44ad-9d5a-147f67b696b6"}}}]
(full record)

but how will get to access the value guid here?

Please give me the correct method to perform this action, my bot will be surfaced into microsoft teams.

Start with the System.Activity.Attachments expression and the full attachment record shown in the issue, then review the linked Microsoft documentation and examples for uploaded files. Confirm how the ConversationFileReference GUID is accessed and how the PDF content is processed when the bot is surfaced in Microsoft Teams.