Question: Yelü Chucai was a retainer of which founder of the Mongol Empire?
Sentence (from "Yelü Chucai"): Yelü Chucai (Yeh-lu Chu-tsai; ; Mongolian: Urtu Saqal, 吾圖撒合里, "long beard"; the components of his name also variously spelt Yeh-Lu, Ye Liu, Yeliu, Chutsai, Ch'u-Ts'ai, etc.) (July 24, 1190 - June 20, 1244) was a statesman of Khitan ethnicity with royal family lineage to the Liao Dynasty, who became a vigorous adviser and administrator of the early Mongol Empire in the Confucian tradition.
Relevant evidence: No