Question: What Pixar short written by the originator and co-director of Pixar's Oscar-winning 2007 film "Ratatouille" won an Academy Award for Best Animated Short Film in 1998?
Sentence (from "La Luna (2011 film)"): "La Luna" was released on November 13, 2012, on the "Brave" DVD and Blu-ray, and on a new "Pixar Short Films Collection, Volume 2", the second collection of Pixar's short films.
Relevant evidence: No