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 "The Dam Keeper"): It tells the story of Pig, an introverted youth who lives in a windmill and keeps a dark fog from engulfing his town.
Relevant evidence: No