Problem: Does "The Rus' and Slavs had earlier allied with the Khazars against Arab raids on the Caucasus, but they increasingly worked against them to secure control of the trade routes." answer the question "Who were allies with the Khazars?"

A: no

Problem: Does "It is also known as the Wenchuan earthquake (Chinese: ; pinyin: Wenchuan da dizhen; literally: "Great Wenchuan earthquake"), after the location of the earthquake's epicenter, Wenchuan County, Sichuan." answer the question "How far was it from Chengdu?"

A: no

Problem: Does "Originally, iPod software only worked with Mac OS; iPod software for Microsoft Windows was launched with the second generation model." answer the question "What Microsoft media format is not natively supported by Apple devices?"

A:
no