###Answer the question from the input provided. Please answer from input only.

###Input: He came to power by uniting many of the nomadic tribes of Northeast Asia. After founding the Mongol Empire and being proclaimed "Genghis Khan", he started the Mongol invasions that resulted in the conquest of most of Eurasia. These included raids or invasions of the Qara Khitai, Caucasus, Khwarezmid Empire, Western Xia and Jin dynasties. These campaigns were often accompanied by wholesale massacres of the civilian populations – especially in the Khwarezmian and Xia controlled lands. By the end of his life, the Mongol Empire occupied a substantial portion of Central Asia and China.

Before Genghis Khan died, he assigned Ögedei Khan as his successor and split his empire into khanates among his sons and grandsons. He died in 1227 after defeating the Western Xia. He was buried in an unmarked grave somewhere in Mongolia at an unknown location. His descendants extended the Mongol Empire across most of Eurasia by conquering or creating vassal states out of all of modern-day China, Korea, the Caucasus, Central Asia, and substantial portions of modern Eastern Europe, Russia, and Southwest Asia. Many of these invasions repeated the earlier large-scale slaughters of local populations. As a result, Genghis Khan and his empire have a fearsome reputation in local histories.

Temüjin was probably born in 1162 in Delüün Boldog, near Burkhan Khaldun mountain and the Onon and Kherlen rivers in modern-day northern Mongolia, not far from the current capital Ulaanbaatar. The Secret History of the Mongols reports that Temüjin was born with a blood clot grasped in his fist, a traditional sign that he was destined to become a great leader. He was the second-oldest son of his father Yesügei, a Khamag Mongol's major chief of the Kiyad and an ally of Toghrul Khan of the Keraite tribe, and the oldest son of his mother Hoelun. According to the Secret History, Temüjin was named after a Tatar chieftain, Temüjin-üge, whom his father had just captured.

Temüjin had three brothers named Hasar, Hachiun, and Temüge, and one sister named Temülen, as well as two half-brothers named Begter and Belgutei. Like many of the nomads of Mongolia, Temüjin's early life was difficult. His father arranged a marriage for him, and at nine years of age he was delivered by his father to the family of his future wife Börte, who was a member of the tribe Khongirad. Temüjin was to live there in service to Dai Setsen, the head of the new household, until he reached the marriageable age of 12.

For the next several years, Hoelun and her children lived in poverty, surviving primarily on wild fruits and ox carcasses, marmots, and other small game killed by Temüjin and his brothers. Begter, Temujin's older half-brother, began to exercise the power of the eldest male in the family and eventually Temujin's mother Hoelun (not Begter's mother) would have to accept him as her husband if and when he became an adult. Temujin's resentment erupted during one hunting excursion that Temüjin and his brother Khasar killed their half-brother Begter.



###Question: Who did Genghis Khan assign as his successor?

###Answer: {'answer':'Ögedei Khan'}