:- phrase(list(Es), Xs0,Xs).
:- phrase(list(Es), Es,Es).
< @@	% Es = [].
< @@	! Ausführung dauert zu lang, Antwort unvollständig
< Why the loop here?
*> Compare this goal to the goal :- phrase(list(Es), Es,Xs), Es = Xs.
list([]) -->
	[].
list([E|Es]) -->
	[E],
	list(Es).
-----         n599 ------------------------

Longer answers (which are frequently of general interest) make a reference to a newly created hint.
Add this new goal.