You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Pub

Context:
A "beer engine" is a device for pumping beer, originally manually operated and typically used to dispense beer from a cask or container in a pub's basement or cellar.

Question:
What is a "beer engine"?

a device for pumping beer