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:
American_Broadcasting_Company

Context:
At the end of 1949, movie theater operator United Paramount Theatres (UPT) was forced by the U.S. Supreme Court to become an independent entity, separating itself from Paramount Pictures. For its part, ABC was on the verge of bankruptcy, with only five owned-and-operated stations and nine full-time affiliates. Its revenues, which were related to advertising and were indexed compared to the number of listeners/viewers, failed to compensate for its heavy investments in purchasing and building stations. In 1951, a rumor even mentioned that the network would be sold to CBS. In 1951, Noble held a 58% ownership stake in ABC, giving him $5 million with which to prevent ABC from going bankrupt; as banks refused further credit, that amount was obtained through a loan from the Prudential Insurance Company of America.

Question:
In 1951, rumors claimed that ABC might be sold to what network?

CBS