Question: Pumpkin ale can be produced by using what ingredient as a portion of the grain bill?
Sentence (from "Mash ingredients"): Mashing is the act of creating and extracting fermentable and non-fermentable sugars and flavor components from grain by steeping it in hot water, and then letting it rest at specific temperature ranges to activate naturally occurring enzymes in the grain that convert starches to sugars.
Relevant evidence: No