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.

[EX Q]: Passage: Ethiopian historians such as Taddesse Tamrat (1935–2013) and Sergew Hable Sellassie have argued that modern Ethiopian studies were an invention of the 17th century and originated in Europe. Tamrat considered Carlo Conti Rossini's 1928 Storia d'Etiopia a groundbreaking work in Ethiopian studies. The philosopher Messay Kebede likewise acknowledged the genuine contributions of Western scholars to the understanding of Ethiopia's past. But he also criticized the perceived scientific and institutional bias that he found to be pervasive in Ethiopian-, African-, and Western-made historiographies on Ethiopia. Specifically, Kebede took umbrage at E. A. Wallis Budge's translation of the Kebra Nagast, arguing that Budge had assigned a South Arabian origin to the Queen of Sheba although the Kebra Nagast itself did not indicate such a provenience for this fabled ruler. According to Kebede, a South Arabian extraction was contradicted by biblical exegetes and testimonies from ancient historians, which instead indicated that the Queen was of African origin. Additionally, he chided Budge and Ullendorff for their postulation that the Aksumite civilization was founded by Semitic immigrants from South Arabia. Kebede argued that there is little physical difference between the Semitic-speaking populations in Ethiopia and neighboring Cushitic-speaking groups to validate the notion that the former groups were essentially descendants of South Arabian settlers, with a separate ancestral origin from other local Afroasiatic-speaking populations. He also observed that these Afroasiatic-speaking populations were heterogeneous, having interbred with each other and also assimilated alien elements of both uncertain extraction and negroid origin.
[EX A]: What are the full names of the two Ethiopian historians that have argued that modern Ethiopian studies were an invention the the 17th century?

[EX Q]: Passage: The Willamette River ( (listen) wil-AM-it) is a major tributary of the Columbia River, accounting for 12 to 15 percent of the Columbia's flow. The Willamette's main stem is 187 miles (301 km) long, lying entirely in northwestern Oregon in the United States. Flowing northward between the Oregon Coast Range and the Cascade Range, the river and its tributaries form the Willamette Valley, a basin that contains two-thirds of Oregon's population, including the state capital, Salem, and the state's largest city, Portland, which surrounds the Willamette's mouth at the Columbia.
Originally created by plate tectonics about 35 million years ago and subsequently altered by volcanism and erosion, the river's drainage basin was significantly modified by the Missoula Floods at the end of the most recent ice age. Humans began living in the watershed over 10,000 years ago. There were once many tribal villages along the lower river and in the area around its mouth on the Columbia. Indigenous peoples lived throughout the upper reaches of the basin as well.
Rich with sediments deposited by flooding and fed by prolific rainfall on the western side of the Cascades, the Willamette Valley is one of the most fertile agricultural regions in North America, and was thus the destination of many 19th-century pioneers traveling west along the Oregon Trail. The river was an important transportation route in the 19th century, although Willamette Falls, just upstream from Portland, was a major barrier to boat traffic. In the 21st century, major highways follow the river, and roads cross it on more than 50 bridges.
Since 1900, more than 15 large dams and many smaller ones have been built in the Willamette's drainage basin, 13 of which are operated by the U.S. Army Corps of Engineers (USACE). The dams are used primarily to produce hydroelectricity, to maintain reservoirs for recreation, and to prevent flooding. The river and its tributaries support 60 fish species, including many species of salmon and trout; this is despite the dams, other alterations, and pollution (especially on the river's lower reaches). Part of the Willamette Floodplain was established as a National Natural Landmark in 1987 and the river was named as one of 14 American Heritage Rivers in 1998.
[EX A]: What organization operates 13 of the dams built in the river that is a major tributary of the Columbia river?

[EX Q]: Passage: During the Blitz, Charlie, Carrie, and Paul are evacuated from London to Pepperinge Eye, where they are placed in the reluctant care of Miss Eglantine Price, who agrees to the arrangement temporarily. The three children attempt to run back to London, but after observing Miss Price attempting to fly on a broomstick, they change their minds. Miss Price reveals she is learning witchcraft through a correspondence school with hopes of using her spells in the British war effort, and offers the children a transportation spell in exchange for their silence. She casts the spell on a bedknob, and adds only Paul can work the spell, since he's the one who handed it to her. 
Later, Miss Price receives a letter from her school announcing its closure, thus preventing her from learning the final spell. She convinces Paul to use the enchanted bed to return the group to London, and locate Professor Emelius Browne. They discover Browne is actually a charismatic showman who created the course from an old book, and is surprised to learn the spells actually work for Miss Price. He gives the book to Miss Price, who is distraught to discover the final spell, "Substitutiary Locomotion," is missing.
The group travels to Portobello Road to locate the rest of the book. They are approached by Swinburne, who takes them to the Bookman, who possesses the remainder of the book. They exchange their pieces, but learn only the spell was inscribed on a medallion, the Star of Astaroth, that belonged to a sorcerer of that name. The Bookman reveals the medallion may have been taken by a pack of wild animals, given anthropomorphism by Astaroth, to a remote island called Naboombu.
It was said in the 17th century, a lascar claimed he saw Naboombu. The Bookman, however, does not believe the island exists, as he looked in every chart for it, until Paul confirms its existence via a storybook.
[EX A]:
What are the names of the people who observed Miss Price attempting to fly on a broomstick?