Complex sentence: The Hungarian String Quartet was a musical ensemble of world renown, particularly famous for its performances of quartets by Beethoven and by Bartók, which was founded in Budapest in 1935 (as the New Hungarian Quartet) and was disbanded in 1972.
Split into simpler sentences: The Hungarian String Quartet was a musical ensemble of world renown, particularly famous for its performances of quartets by Beethoven and Bartók. The quartet was founded in Budapest in 1935 (as the New Hungarian Quartet) and was disbanded in 1972.