Question: Where was a Belgian variety of hop cultivated, it is used for a type of beer brewed in the Pajottenland region of Belgium southwest of Brussels and in Brussels itself at the Cantillon Brewery?
Sentence (from "Lambic"): Lambic differs from most other beers in that it is fermented through exposure to wild yeasts and bacteria native to the Zenne valley, as opposed to exposure to carefully cultivated strains of brewer's yeast.
Relevant evidence: No