Input: Kievan Rus%27
Igor returned to Kiev keen for revenge. He assembled a large force of warriors from among neighboring Slavs and Pecheneg allies, and sent for reinforcements of Varangians from “beyond the sea.” In 944 the Rus' force advanced again on the Greeks, by land and sea, and a Byzantine force from Cherson responded. The Emperor sent gifts and offered tribute in lieu of war, and the Rus' accepted. Envoys were sent between the Rus’, the Byzantines, and the Bulgarians in 945, and a peace treaty was completed. The agreement again focused on trade, but this time with terms less favorable to the Rus’, including stringent regulations on the conduct of Rus’ merchants in Cherson and Constantinople and specific punishments for violations of the law. The Byzantines may have been motivated to enter the treaty out of concern of a prolonged alliance of the Rus', Pechenegs, and Bulgarians against them, though the more favorable terms further suggest a shift in power.

IN what year was the peace treaty signed between the Rus,  Byzantine and the Bulgarians.
Output: 945

Input: Middle Ages
During this period the practice of manuscript illumination gradually passed from monasteries to lay workshops, so that according to Janetta Benton "by 1300 most monks bought their books in shops", and the book of hours developed as a form of devotional book for lay-people. Metalwork continued to be the most prestigious form of art, with Limoges enamel a popular and relatively affordable option for objects such as reliquaries and crosses. In Italy the innovations of Cimabue and Duccio, followed by the Trecento master Giotto (d. 1337), greatly increased the sophistication and status of panel painting and fresco. Increasing prosperity during the 12th century resulted in greater production of secular art; many carved ivory objects such as gaming-pieces, combs, and small religious figures have survived.

Along with Duccio, what Italian artist was a noted innovator in this period?
Output: Cimabue

Input: Iran
Alongside the capital, the most popular tourist destinations are Isfahan, Mashhad and Shiraz. In the early 2000s, the industry faced serious limitations in infrastructure, communications, industry standards and personnel training. The majority of the 300,000 tourist visas granted in 2003 were obtained by Asian Muslims, who presumably intended to visit important pilgrimage sites in Mashhad and Qom. Several organized tours from Germany, France and other European countries come to Iran annually to visit archaeological sites and monuments. In 2003, Iran ranked 68th in tourism revenues worldwide. According to UNESCO and the deputy head of research for Iran Travel and Tourism Organization (ITTO), Iran is rated 4th among the top 10 destinations in the Middle East. Domestic tourism in Iran is one of the largest in the world. Weak advertising, unstable regional conditions, a poor public image in some parts of the world, and absence of efficient planning schemes in the tourism sector have all hindered the growth of tourism.

What does Teheran, Isfahan, Mashhad, and Shiraz have in common?
Output: the most popular tourist destinations

Input: Chinese characters
Even the Zhonghua Zihai does not include characters in the Chinese family of scripts created to represent non-Chinese languages. Characters formed by Chinese principles in other languages include the roughly 1,500 Japanese-made kokuji given in the Kokuji no Jiten, the Korean-made gukja, the over 10,000 Sawndip characters still in use in Guangxi, and the almost 20,000 Nôm characters formerly used in Vietnam.[citation needed] More divergent descendents of Chinese script include Tangut script, which created over 5,000 characters with similar strokes but different formation principles to Chinese characters.

What is formed by Chinese principles? 
Output:
Characters