Freedom UI find Id of object linked to Approvals

Hi Community,

With freedom UI the logic of approvals and how they are linked to other objects seems to have changed a bit.

What is the way to get to the record of the object that a given approval was generated for?

My concrete case is:

an approval created for an opportunity 

and I need to, in a business process, get the record of the opportunity, 

to send and email to a user mapped in the  opportunity

Thanks,

Luis