In this task, you will be presented with a context passage, a question about that paragraph, and a possible answer to that question. The task is to check the validity of the answer. Answer with "Yes" or "No".

[EX Q]: Magnets are able to place a force on certain materials. This force is called a magnetic force. The force a magnet exerts is a little different from the forces you may normally think about. You exert a force on a book when you lift it. You also exert a force on the pedals of your bicycle. In both those cases, those forces cause a change. The change you see in both these cases is called motion. Magnets, too, can produce change. They can produce motion just like you do. Unlike you, magnets do not have to touch something to exert a force. A magnetic force is exerted over a distance. Thats right, a magnet can push or pull certain items without ever touching them. Thats how the maglev train works. Do you know another type of force that does not require objects to touch? These forces are known as non-contact forces. Another type of non-contact force you may be familiar with is gravity. Gravity too can cause changes in motion. Gravity holds our moon in orbit without touching it. <sep>The force magnets put on certain materials is called what?<sep>Magnets do not put force on certain materials
[EX A]: No

[EX Q]: In the meantime the Indians had retreated to the lava beds and bade defiance to the soldiers. General Wheaton, commanding the district of the Lakes, ordered the concentration of troops from Camps Warner and Bidwell, while General Canby sent the forces under Colonel John Green and Major Mason from Ft. Vancouver to join the command under General Wheaton. As soon as the settlers could fort up for mutual protection, the entire forces of regulars and volunteers were concentrated at Van Bremer's ranch west of the lava beds under General Wheaton and at Land's ranch on the east side of Tule Lake and directly north of the stronghold. Such was the disposition of the forces when I arrived at headquarters at Van Bremer's ranch. By orders of Governor Grover of Oregon the volunteers under Captains O. C. Applegate and Kelley were placed under the command of General Wheaton. The two companies numbered about 225 men, and were commanded by General John E. Ross, a veteran Indian fighter, but too old to withstand the hardships of a winter campaign against Indians. The men were all poorly provided with clothing and bedding, most all having taken only what they could strap behind their saddles, but in spite of this and a temperature often below zero, no murmur was heard, and all anxiously, eagerly looked forward to a meeting with the brutal savage murderers of their fellow citizens. Such were the conditions when I arrived at headquarters. <sep>The area to where the Indians had retreated, where in proximity to Van Bremer's ranch?<sep>Yes, because the lava beds stronghold was east of Van Bremer's ranch
[EX A]: Yes

[EX Q]: We waited for half an hour, watching the smoke curling over the house, and then, judging that the Indians had made off for fear of being ambushed, we crossed the clearing. It took but a glance to read the story. The women had been washing by the little brook before the cabin, with the children playing about them, when the Indians had come up and with a single volley killed them all except the child we had heard crying. They had swooped down upon their victims, torn the scalps from their heads, looted the house, and set fire to it. We dragged out the body of the woman which had been thrown within, in the hope that a spark of life might yet remain, but she was quite dead. Beneath the warrior Spiltdorph had shot we found the child. It was a boy of some six or seven years, and so covered with blood that it seemed it must be dead. But we stripped it and washed it in the brook, and found no wounds upon it except in the head, where it had been struck with a hatchet before its scalp had been stripped off. The cold water brought it back to life and it began to cry again, whereat Spiltdorph took off his coat and wrapped it tenderly about it. <sep>Something was stripped and found with only wounds in the head. What was is?<sep>A boy of some six or seven years
[EX A]:
Yes