How to bulk remove attachments in Activity object

Summary:

We are trying to delete some attachments from Activity object.

Can you please guide us the steps.

Content (please ensure you mask any confidential information):

Hi,

We are trying to delete some attachments from Activity object.

We were trying bulk import tool to do this task foolowing this document Delete Attachments (oracle.com). However, we cannot figure out what is the valid user Key it is asking for.

Where can we get the Pk1Value or the ObjectPuid? Any query?

Thank you,

Nirmani

Version (include the version you are using, if applicable):

11.13.24.01.0 

Code Snippet (add any code snippets that support your topic, if applicable):