###Answer the question from the input provided. Please answer from input only.

###Input: In the 1930s, radio in the United States was dominated by three companies: the Columbia Broadcasting System (CBS), the Mutual Broadcasting System and the National Broadcasting Company (NBC). The last was owned by electronics manufacturer Radio Corporation of America (RCA), which owned two radio networks that each ran different varieties of programming, NBC Blue and NBC Red. The NBC Blue Network was created in 1927 for the primary purpose of testing new programs on markets of lesser importance than those served by NBC Red, which served the major cities, and to test drama series.

In 1934, Mutual filed a complaint with the Federal Communications Commission (FCC) regarding its difficulties in establishing new stations, in a radio market that was already being saturated by NBC and CBS. In 1938, the FCC began a series of investigations into the practices of radio networks and published its report on the broadcasting of network radio programs in 1940. The report recommended that RCA give up control of either NBC Red or NBC Blue. At that time, the NBC Red Network was the principal radio network in the United States and, according to the FCC, RCA was using NBC Blue to eliminate any hint of competition. Having no power over the networks themselves, the FCC established a regulation forbidding licenses to be issued for radio stations if they were affiliated with a network which already owned multiple networks that provided content of public interest.

Once Mutual's appeals against the FCC were rejected, RCA decided to sell NBC Blue in 1941, and gave the mandate to do so to Mark Woods. RCA converted the NBC Blue Network into an independent subsidiary, formally divorcing the operations of NBC Red and NBC Blue on January 8, 1942, with the Blue Network being referred to on-air as either "Blue" or "Blue Network". The newly separated NBC Red and NBC Blue divided their respective corporate assets. Between 1942 and 1943, Woods offered to sell the entire NBC Blue Network, a package that included leases on landlines, three pending television licenses (WJZ-TV in New York City, KGO-TV in San Francisco and WENR-TV in Chicago), 60 affiliates, four operations facilities (in New York City, Chicago, Los Angeles and Washington D.C.), contracts with actors, and the brand associated with the Blue Network. Investment firm Dillon, Read & Co. (which was later acquired by the Swiss Bank Corporation in 1997) offered $7.5 million to purchase the network, but the offer was rejected by Woods and RCA president David Sarnoff.

Edward John Noble, the owner of Life Savers candy, drugstore chain Rexall and New York City radio station WMCA, purchased the network for $8 million. Due to FCC ownership rules, the transaction, which was to include the purchase of three RCA stations by Noble, would require him to resell his station with the FCC's approval. The Commission authorized the transaction on October 12, 1943. Soon afterward, the Blue Network was purchased by the new company Noble founded, the American Broadcasting System. Noble subsequently acquired the rights to the "American Broadcasting Company" name from George B. Storer in 1944; its parent company adopted the corporate name American Broadcasting Companies, Inc. Woods retained his position as president and CEO of ABC until December 1949, and was subsequently promoted to vice-chairman of the board before leaving ABC altogether on June 30, 1951.

ABC became an aggressive competitor to NBC and CBS when, continuing NBC Blue's traditions of public service, it aired symphony performances conducted by Paul Whiteman, performances from the Metropolitan Opera, and jazz concerts aired as part of its broadcast of The Chamber Music Society of Lower Basin Street announced by Milton Cross. The network also became known for such suspenseful dramas as Sherlock Holmes, Gang Busters and Counterspy, as well as several mid-afternoon youth-oriented programs. However, ABC made a name for itself by utilizing the practice of counterprogramming, with which it often placed shows of its own against the offerings of NBC and CBS, adopting the use of the Magnetophon tape recorder, brought to the U.S. from Nazi Germany after its conquest, to pre-record its programming. With the help of the Magnetophon, ABC was able to provide its stars with greater freedom in terms of time, and also attract several big names, such as Bing Crosby at a time when NBC and CBS did not allow pre-taped shows.



###Question: What company filed a complaint with the FCC in 1934 concerning problems establishing new stations?

###Answer: {'answer':'Mutual'}