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:
Doctor_Who

Context:
A new arrangement of the theme, once again by Gold, was introduced in the 2007 Christmas special episode, "Voyage of the Damned"; Gold returned as composer for the 2010 series. He was responsible for a new version of the theme which was reported to have had a hostile reception from some viewers. In 2011, the theme tune charted at number 228 of radio station Classic FM's Hall of Fame, a survey of classical music tastes. A revised version of Gold's 2010 arrangement had its debut over the opening titles of the 2012 Christmas special "The Snowmen", and a further revision of the arrangement was made for the 50th Anniversary special "The Day of the Doctor" in November 2013.[citation needed]

Question:
Who was the creator of the theme for the 50th Anniversary special?

Gold