In this task, you are given a question and a context passage. You have to answer the question based on the given passage.

[Q]: What did Khan do before Jochi's death in 1226?, Context: Jochi died in 1226, during his father's lifetime. Some scholars, notably Ratchnevsky, have commented on the possibility that Jochi was secretly poisoned by an order from Genghis Khan. Rashid al-Din reports that the great Khan sent for his sons in the spring of 1223, and while his brothers heeded the order, Jochi remained in Khorasan. Juzjani suggests that the disagreement arose from a quarrel between Jochi and his brothers in the siege of Urgench. Jochi had attempted to protect Urgench from destruction, as it belonged to territory allocated to him as a fief. He concludes his story with the clearly apocryphal statement by Jochi: "Genghis Khan is mad to have massacred so many people and laid waste so many lands. I would be doing a service if I killed my father when he is hunting, made an alliance with Sultan Muhammad, brought this land to life and gave assistance and support to the Muslims." Juzjani claims that it was in response to hearing of these plans that Genghis Khan ordered his son secretly poisoned; however, as Sultan Muhammad was already dead in 1223, the accuracy of this story is questionable.
[A]: sent for his sons in the spring of 1223


[Q]: An object that is fixed in place and cannot move is said to be also what?, Context: The normal force is due to repulsive forces of interaction between atoms at close contact. When their electron clouds overlap, Pauli repulsion (due to fermionic nature of electrons) follows resulting in the force that acts in a direction normal to the surface interface between two objects.:93 The normal force, for example, is responsible for the structural integrity of tables and floors as well as being the force that responds whenever an external force pushes on a solid object. An example of the normal force in action is the impact force on an object crashing into an immobile surface.
[A]: immobile


[Q]: Why might a gymnast increase lower body amplitude?, Context: A higher flight phase results in a higher vertical ground reaction force. Vertical ground reaction force represents external force which the gymnasts have to overcome with their muscle force and has an impact on the gymnasts linear and angular momentum. Another important variable that affects linear and angular momentum is time the landing takes Gymnasts can alter the shape of the area by increasing the time taken to perform the landing. Gymnasts can achieve this by increasing hip, knee and ankle amplitude. With the increase of height, the amplitude in ankles knees and hips rise the bars.
[A]:
perform the landing