“…At present, a series of tools for this purpose have been proposed, designed and used [35] . Among these we can mention ANAGRA, 1 BURGRAM 2 [36] , JavaPars, 3 PAVT [37] , SEFALAS, JFLAP 4 [38] , VAST [39] , [40] , CUPV [41] , PPVT [42] , LISA 5 [43] , Evaluators 2.0 [44] , VCOCO [45] , PAG [46] , Grammophone 6 or Proletool 2.0 7 [47] .…”