8. A method according to claim 7 , wherein steps i) and ii) are reiterated for a plurality of events of said document.
8. A method according to claim 7 , wherein steps i) and ii) are reiterated for a plurality of events of said document. 9. A method according to claim 8 , wherein the grammar comprises at least one transition associating a preceding production of the first group with a following production of the first group, said prediction at step c) comprising, based on the at least one transition, the determination of a following production associated with a production describing an event processed during a preceding iteration.