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:
Sony_Music_Entertainment

Context:
In 1966, CBS reorganized its corporate structure with Leiberson promoted to head the new "CBS-Columbia Group" which made the now renamed CBS Records company a separate unit of this new group run by Clive Davis.

Question:
Who ran CBS-Columbia Group starting in 1966?

Leiberson