original question: What is the conference event of [Proceedings of the Gray Vireo Symposium Co-Sponsored by the New Mexico Department of Game and Fish and the New Mexico Ornithological Society]?
answer: 2008 gray vireo symposium
answer type: Conference event.
auxiliary information: The proceedings contain expanded abstracts of oral papers presented at the New Mexico Department of Game and Fish and the New Mexico Ornithological Society co-sponsored Gray Vireo Symposium, which was held 12‚Äì13 April 2008 at the Vagabond Inn Executive in Albuquerque, New Mexico.
Which conference event was held on the 12th and 13th of April, 2008 at the [Proceedings of the Gray Vireo Symposium Co-Sponsored by the New Mexico Department of Game and Fish and the New Mexico Ornithological Society]?