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 1989, CBS Records re-entered the music publishing business by acquiring Nashville music publisher Tree International Publishing for more than $30 million.

Question:
In what year did CBS Records buy out Tree International Publishing?

1989