Hello, It depends in which version ? The tagged version, I think, is included in the distribution of the Natural Language Toolkit (http://nltk.sourceforge.net/) and it is free ! Regards. -- Alexandre Allauzen ATER Paris XI, LIMSI-CNRS Tel : 01.69.85.80.64 (80.88) Bur : 114 LIMSI Bat. 508 allauzen at limsi.fr