original_query: What is the role of flor yeast in the production of dry sherries?
query: What is the role of flor yeast in the production of dry sherries?
answer: Flor yeast, a strain of Saccharomyces yeast, floats on top of sherry in barrels. It acts as a protective layer, shielding the wine from oxidation and resulting in a lighter, fresher taste than other sherries.