GIVE-2/2.5 manual: https://sites.google.com/site/givechallenge/home/participants-manual
Alexander Koller, Kristina Striegnitz, Andrew Gargett, Donna Byron, Justine Cassell, Robert Dale, Johanna Moore, and Jon Oberlander. 2010. Report on the Second NLG Challenge on Generating Instructions in Virtual Environments (GIVE-2). In Proceedings of the 6th International Natural Language Generation Conference. Association for Computational Linguistics.