Persistent state

Hi,

I am working in a project where I need to use Start_Prolog and Stop_Prolog
in different places. How could I save facts before calling Stop_prolog to
use them later in another prolog session, this means, I use Start_Prolog,
then I do different things, and finally I use Stop_Prolog


  Start_Prolog
    ...
    ...
    facts
     ...

   Stop_Prolog



  Start_Prolog
    ...
    ...
    I need to use the former facts here
     ...

   Stop_Prolog


Cheers,

   Carlos.