Passage: Literature and music are other venues for expressing the country's ideology. Kim Jong-il showed interest in or perhaps even obsession with cinema. The North Korean leader reportedly had a huge library of Western and Asian movies. In the 1980s, he even ordered the kidnapping of two South Korean movie-makers and forced them to make films for the North Korean state.  A series of historical novels—Pulmyouui yoksa (Immortal History)—depict the heroism and tragedy of the preliberation era. The Korean War is the theme of Korea Fights and The Burning Island. Since the late 1970s, five "great revolutionary plays" have been promoted as prototypes of the party's literature: The Shrine for a Tutelary Deity, a theatrical rendition of The Flower Girl, Three Men, One Party, A Letter from a Daughter, and Hyolbun mangukhoe (Resentment at the World Conference).Korean revolutionary opera, derived from traditional Korean operas, known as ch'angguk, often utilize variations on Korean folk songs. Old fairy tales have also been transformed to include revolutionary themes. As part of the party's policy of preserving the best from Korea's past, moreover, premodern vernacular works such as the Sasong kibong (Encounter of Four Persons) and the Ssangch'on kibong (Encounter at the Two Rivers) have been reprinted.Musical compositions include the "Song of General Kim Il Sung", "Long Life and Good Health to the Leader," and "We Sing of His Benevolent Love"—hymns that praise the nation's leader. According to a North Korean writer, "Our musicians have pursued the party's policy of composing orchestral music based on famous songs and folk songs popular among our people and produced numerous instrumental pieces of a new type." This music includes a symphony based on the theme of The Sea of Blood, which has also been made into a revolutionary opera.In February 2008, The New York Philharmonic Orchestra became the first U.S. orchestra to perform in North Korea, albeit for a handpicked "invited audience." The concert was broadcast on national...

Question: What else besides music is considered to be a part of country ideology?
Literature