20. The computer-implemented method according to claim 18 , wherein modeling the context representation includes varying in a time dependent manner the value of the activation attribute of the at least one context entity.
20. The computer-implemented method according to claim 18 , wherein modeling the context representation includes varying in a time dependent manner the value of the activation attribute of the at least one context entity. 21. The computer-implemented method according to claim 20 , wherein varying in a time dependent manner the value of the activation attribute includes decreasing over time the value of the activation attribute according to a predetermined fade curve.