You need to save the response, which contains the desired information, to a variable using this action:
After that, you need to take the required data from the previously saved variable using this action:
Or this action:
You can learn about how to make Xpath queries on the Internet.
@Omini yes, I just tried this way too, it still seems to cut-off at 1,000,000 bytes, so it wasn't related to breaking due to content etc, it still seems to be a data length / quota memory problem