Context: Much of the Great Plains became open range, or rangeland where cattle roamed free, hosting ranching operations where anyone was theoretically free to run cattle. In the spring and fall, ranchers held roundups where their cowboys branded new calves, treated animals and sorted the cattle for sale. Such ranching began in Texas and gradually moved northward. In 1866-95, cowboys herded 10 million cattle north to rail heads such as Dodge City, Kansas and Ogallala, Nebraska; from there, cattle were shipped eastward.

Question: what type of land is much of the great plans?
Answer: open range

Question: when did ranchers usually have a cattle round up?
Answer: spring and fall

Question: in a cattle round up, what did ranchers do to the new calves?
Answer: branded

Question: from 1866-95 about how many cattle did cowboys herd?
Answer: 10 million

Question: In what year were cattle first left free to roam the Great Plains?
Answer: Unanswerable

Question: How many cowboys did it take to herd 10 million cattle north?
Answer: Unanswerable

Question: How many people lived in Dodge City, Kansas in 1866?
Answer: Unanswerable

Question: Where were the cattle shipped eastward to during the late 1800s?
Answer: Unanswerable

Question: How many cattle went through Dodge City, Kansas between the years 1866-95?
Answer: Unanswerable