Affiliation: | Departamento de Ciencia da Computacao, Instituto de Matematica e Estatistica, Universidade de Sao Paulo, Brazil. E-mail: mfinger@ime.usp.br Departments of A1 Linguistics, and A Computing, School of Oriental Studies, University of London, UK. E-mail: {rk8/rk}@soas.ac.uk A3 Department of Computing, Imperial College, University of London, UK. E-mail: dg@doc.ic.ac.uk |