In this task, you're given passages that contain mentions of names of people, places, or things. Some of these mentions refer to the same person, place, or thing. Your job is to write questions that evaluate one's understanding of such references. Good questions are expected to link pronouns (she, her, him, his, their, etc.) or other mentions to people, places, or things to which they may refer. Do not ask questions that can be answered correctly without understanding the paragraph or having multiple answers. Avoid questions that do not link phrases referring to the same entity. For each of your questions, the answer should be one or more phrases in the paragraph, and it should be unambiguous.
--------
Question: Passage: Musician, Charlie Rogers, is fired from a gig at a teahouse run by Lou, after brawling with several college students in the parking lot. After a night in jail, Charlie hits the road on his Honda 305 Superhawk motorcycle. He spots Cathy Lean driving with her father Joe, and their employer, Maggie Morgan. When Charlie tries to become friendly with Cathy, Joe forces him off the road and the bike is wrecked after crashing into a wooden fence.
Maggie offers him a place to stay and a job with her struggling traveling carnival while the bike is being repaired. Charlie becomes a "carnie", a roustabout. Maggie recognizes his musical talents and promotes him to feature attraction. His act soon draws large crowds. Off stage, Charlie romances Cathy, which creates animosity with Joe. After the two men repeatedly clash and Charlie is accused of holding back a customer's lost wallet that Joe was accused of stealing, Charlie leaves to star in the much better financed show of rival carnival producer Harry Carver.
Once again, he is a great success. However, when Charlie learns that Maggie is facing bankruptcy, he returns to her carnival. In the musical finale, he is happily reunited with Cathy.

Answer: What is the full name of the person that Maggie offers a place to stay?


Question: Passage: In 1670, Charles II incorporated by royal charter the Hudson's Bay Company (HBC), granting it a monopoly on the fur trade in the area known as Rupert's Land, which would later form a large proportion of the Dominion of Canada. Forts and trading posts established by the HBC were frequently the subject of attacks by the French, who had established their own fur trading colony in adjacent New France.Two years later, the Royal African Company was inaugurated, receiving from King Charles a monopoly of the trade to supply slaves to the British colonies of the Caribbean. From the outset, slavery was the basis of the British Empire in the West Indies. Until the abolition of its slave trade in 1807, Britain was responsible for the transportation of 3.5 million African slaves to the Americas, a third of all slaves transported across the Atlantic. To facilitate this trade, forts were established on the coast of West Africa, such as James Island, Accra and Bunce Island. In the British Caribbean, the percentage of the population of African descent rose from 25% in 1650 to around 80% in 1780, and in the Thirteen Colonies from 10% to 40% over the same period (the majority in the southern colonies). For the slave traders, the trade was extremely profitable, and became a major economic mainstay for such western British cities as Bristol and Liverpool, which formed the third corner of the triangular trade with Africa and the Americas. For the transported, harsh and unhygienic conditions on the slaving ships and poor diets meant that the average mortality rate during the Middle Passage was one in seven.In 1695, the Parliament of Scotland granted a charter to the Company of Scotland, which established a settlement in 1698 on the Isthmus of Panama. Besieged by neighbouring Spanish colonists of New Granada, and afflicted by malaria, the colony was abandoned two years later. The Darien scheme was a financial disaster for Scotland—a quarter of Scottish capital was lost in the enterprise—and ended Scottish hopes of establishing its own overseas empire. The episode also had major political consequences, persuading the governments of both England and Scotland of the merits of a union of countries, rather than just crowns. This occurred in 1707 with the Treaty of Union, establishing the Kingdom of Great Britain.

Answer: In what year did the African population in the thirteen colonies contribute to 10%?


Question: Passage: The nine known exposed geologic formations in Zion National Park are part of a super-sequence of rock units called the Grand Staircase. Together, these formations represent about 150 million years of mostly Mesozoic-aged sedimentation in that part of North America. The formations exposed in the Zion area were deposited as sediment in very different environments:
The warm, shallow (sometimes advancing or retreating) sea of the Kaibab and Moenkopi formations;
Streams, ponds, and lakes of the Chinle, Moenave, and Kayenta formations;
The vast desert of the Navajo and Temple Cap formations; and
The dry near-shore environment of the Carmel Formation.
Uplift affected the entire region, known as the Colorado Plateaus, by slowly raising these formations more than 10,000 feet (3,000 m) higher than where they were deposited. This steepened the stream gradient of the ancestral Virgin and other rivers on the plateau.
The faster-moving streams took advantage of uplift-created joints in the rocks. Eventually, all Cenozoic-aged formations were removed and gorges were cut into the plateaus. Zion Canyon was cut by the North Fork of the Virgin River in this way. During the later part of this process, lava flows and cinder cones covered parts of the area.High water volume in wet seasons does most of the downcutting in the main canyon. These flood events are responsible for transporting most of the 3 million short tons (2.7 million metric tons) of rock and sediment that the Virgin River transports yearly. The Virgin cuts away its canyon faster than its tributaries can cut away their own streambeds, so tributaries end in waterfalls from hanging valleys where they meet the Virgin. The valley between the peaks of the Twin Brothers is a notable example of a hanging valley in the canyon.

Answer:
What is the techniacl term for what caused the steepened stream gradient of the Virgin and other rivers?