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.

Example Input: Passage: Leonard Harrison State Park is a 585-acre (237 ha) Pennsylvania state park in Tioga County, Pennsylvania, in the United States. It is on the east rim of the Pine Creek Gorge, also known as the Grand Canyon of Pennsylvania, which is 800 feet (240 m) deep and nearly 4,000 feet (1,200 m) across here. It also serves as headquarters for the adjoining Colton Point State Park, its sister park on the west rim of the gorge. Leonard Harrison State Park is known for its views of the Pine Creek Gorge, and offers hiking, fishing and hunting, whitewater boating, and camping. The park is in Shippen and Delmar Townships, 10 miles (16 km) west of Wellsboro at the western terminus of Pennsylvania Route 660.
Pine Creek flows through the park and has carved the gorge through five major rock formations from the Devonian and Carboniferous periods. Native Americans once used the Pine Creek Path along the creek. The path was later used by lumbermen, and then became the course of a railroad from 1883 to 1988. Since 1996, the 63.4-mile (102.0 km) Pine Creek Rail Trail has followed the creek through the park. The Pine Creek Gorge was named a National Natural Landmark in 1968 and is also protected as a Pennsylvania State Natural Area and Important Bird Area, while Pine Creek is a Pennsylvania Scenic and Wild River. The gorge is home to many species of plants and animals, some of which have been reintroduced to the area.
Although the Pine Creek Gorge was clearcut in the 19th and early 20th centuries, it is now covered by second growth forest, thanks in part to the conservation efforts of the Civilian Conservation Corps (CCC) in the 1930s. The park is named for Leonard Harrison, a Wellsboro lumberman who cut the timber there, then established the park, which he donated to the state in 1922. The CCC improved the park and built many of its original facilities. Since a successful publicity campaign in 1936, the park has been a popular tourist destination and attracts hundreds of thousands of visitors each year. Leonard Harrison State Park was chosen by the Pennsylvania Department of Conservation and Natural Resources (DCNR) Bureau of Parks for its "25 Must-See Pennsylvania State Parks" list, which praised its "spectacular vistas and a fabulous view of Pine Creek Gorge, also known as Pennsylvania's Grand Canyon".
Example Output: What is the name of the place whose sister park is on the west rim of the gorge?

Example Input: Passage: In the late 1830s, when much of the Old West was still Mexican territory, four people are traveling through the deserts, north of Texas and a three-day ride from Santa Fe.
One the Scalphunter, who says his trade is being a "buffaler" (buffalo hide trader). He is in search of gold. The others are a former ship Captain, also in search of the gold; the Woman from England, a former chambermaid who, in exchange for ship's passage to America, has signed an agreement to serve the Captain for five years as an indentured servant; and Mr. Rainbow, a former soldier who killed Indians.
The Captain sets out to find some of Montezuma's gold, risking danger from both the Native Indians and Mexican soldiers. The woman wants to get out of her contract with the Captain and go to New Orleans. She asks Mr. Rainbow to take her there, but he turns her down.
The Scalphunter wants half of the Captain's gold, and tags along with his men. Mr. Rainbow sets out across the desert through the Viaje de la Muerte, the Journey of Death.
Example Output: What does the nickname for the trade of the man searching for gold actually refer to?

Example Input: Passage: Steamtown, U.S.A., was a steam locomotive museum that ran steam excursions out of North Walpole, New Hampshire, and Bellows Falls, Vermont, from the 1960s to 1983. The museum was founded by millionaire seafood industrialist F. Nelson Blount.  The non-profit Steamtown Foundation took over operations following his death in 1967. Because of Vermont's air quality regulations restricting steam excursions, declining visitor attendance, and disputes over the use of track, some pieces of the collection were relocated to Scranton, Pennsylvania, in the mid-1980s and the rest were auctioned off. After the move, Steamtown continued to operate in Scranton but failed to attract the expected 200,000–400,000 visitors.  Within two years the tourist attraction was facing bankruptcy, and more pieces of the collection were sold to pay off debt.
In 1986, the United States House of Representatives, under the urging of Pennsylvania Representative Joseph M. McDade, voted to approve $8 million to study the collection and to begin the process of making it a National Historic Site. As a result, the National Park Service (NPS) conducted historical research on the equipment that remained in the Foundation's possession. This research was used as a Scope of Collections Statement for the Steamtown National Historic Site.  The scope was published in 1991 under the title Steamtown Special History Study. The report provided concise histories of each piece of equipment and made recommendations as to whether or not each piece belonged in the soon-to-be government-funded collection.
By 1995, Steamtown had been acquired and developed by the NPS with a $66 million allocation. Several more pieces have been removed from the collection as a result of the government acquisition. Part of the Blount collection is still on display at the Steamtown National Historic Site in Scranton.
Example Output:
What is the name of the research conducted by the NPS after it was released in 1991?