Antje Düsterhöft Bernhard Thalheim Introduction to the special issue on Natural Language and Database and Information Systems: NLDB03. 1-3 2005 55 Data Knowl. Eng. 1 http://dx.doi.org/10.1016/j.datak.2004.11.006 db/journals/dke/dke55.html#DusterhoftT05