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:
Westminster_Abbey

Context:
The organ was built by Harrison & Harrison in 1937, then with four manuals and 84 speaking stops, and was used for the first time at the coronation of King George VI. Some pipework from the previous Hill organ of 1848 was revoiced and incorporated in the new scheme. The two organ cases, designed in the late 19th century by John Loughborough Pearson, were re-instated and coloured in 1959.

Question:
Who built the organ?

Harrison & Harrison