Given the task definition and input, reply with output. Given a scientific passage and an answer, generate a question for the given answer.

Passage: Vinegar is an acid that can be produced from the aerobic fermentation of wine. In fact, vinegar is most likely the oldest known acid. It is commonly used as a food additive (to give things an acidic or sour taste) and as a mild cleaning agent. Answer: vinegar
What is an acid that can be produced from the aerobic fermentation of wine?