Acknowledgements

We would like to thank Jeff Siskind for providing us with his software, and for all his help in adapting it for use with our corpus. Thanks also to Agapito Sustaita, Esra Erdem, and Marshall Mayberry for their translation efforts, and to the three anonymous reviewers for their comments which helped improve the paper. This research was supported by the National Science Foundation under grants IRI-9310819 and IRI-9704943.