Acknowledgements

The editors wish to thank the following reviewers for their valuable help in producing this special issue:

Richard K. Belew, Thorsten Brants, Eric Brill, Mary Califf, Claire Cardie, Rafael Carrasco, Alexander Clark, Steve Clark, Daniel Gildea, Hans Van Halteren, Jamie Henderson, Colin De La Higuera, Yuval Krymolowski, Marshall Mayberry, Grace Ngai, Adwait Ratnaparkhi, Erik F. Tjong Kim Sang, Jimi Shanahan, Cindi Thompson, Chris Watkins, Ton Weijters and Maria Wolters.

All of the editors were involved, at some time or other, with the EU TMR project Learning Computational Grammars. The homepage for the project is at http://lcg-www.uia.ac.be/. We wish to thank John Nerbonne for leading the project, Erik F. Tjong Kim Sang for maintaining the excellent shallow parsing website and finally the editorial staff of the JMLR for supporting this special issue.