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 Input:
Passage: Most park visitors sightsee using the scenic drive, which provides access to 13 viewpoints over the amphitheaters. Bryce Canyon has eight marked and maintained hiking trails that can be hiked in less than a day (round trip time, trailhead): Mossy Cave (one hour, State Route 12 northwest of Tropic), Rim Trail (56 hours, anywhere on rim), Bristlecone Loop (one hour, Rainbow Point), and Queens Garden (12 hours, Sunrise Point) are easy to moderate hikes. Navajo Loop (12 hours, Sunset Point) and Tower Bridge (23 hours, north of Sunrise Point) are moderate hikes. Fairyland Loop (45 hours, Fairyland Point) and Peekaboo Loop (34 hours, Bryce Point) are strenuous hikes. Several of these trails intersect, allowing hikers to combine routes for more challenging hikes.
The park also has two trails designated for overnight hiking: the 9-mile (14 km) Riggs Spring Loop Trail and the 23-mile (37 km) Under-the-Rim Trail. Both require a backcountry camping permit. In total there are 50 miles (80 km) of trails in the park.
More than 10 miles (16 km) of marked but ungroomed skiing trails are available off of Fairyland, Paria, and Rim trails in the park. Twenty miles (32 km) of connecting groomed ski trails are in nearby Dixie National Forest and Ruby's Inn.
The air in the area is so clear that on most days from Yovimpa and Rainbow points, Navajo Mountain and the Kaibab Plateau can be seen 90 miles (140 km) away in Arizona. On extremely clear days, the Black Mesas of eastern Arizona and western New Mexico can be seen some 160 miles (260 km) away.The park also has a 7.4 magnitude night sky, making it one of the darkest in North America. Stargazers can, therefore, see 7,500 stars with the naked eye, while in most places fewer than 2,000 can be seen due to light pollution, and in many large cities only a few dozen can be seen. Park rangers host public stargazing events and evening programs on astronomy, nocturnal animals, and night sky protection. The Bryce Canyon Astronomy Festival, typically held in June, attracts thousands of visitors. In honor of this astronomy festival, Asteroid 49272 was named after the national park.There are two campgrounds in the park, North Campground and Sunset Campground. Loop A in North Campground is open year-round. Additional loops and Sunset Campground are open from late spring to early autumn. The 114-room Bryce Canyon Lodge is another way to stay overnight in the park.

Ex Output:
Which hiking trail in Bryce Canyon has the longest estimated hiking time?

Ex Input:
Passage: The Hudson Valley Rail Trail is a paved 4-mile (6.4 km) eastwest rail trail in the town of Lloyd in Ulster County, New York, stretching from the Hudson River through the hamlet of Highland. The trail was originally part of the Poughkeepsie Bridge Route, a rail corridor that crossed the Hudson via the Poughkeepsie Bridge. Controlled by a variety of railroads throughout the 19th and 20th centuries, the bridge was damaged and became unusable after a 1974 fire. By the 1980s the corridor's then-owner, Conrail, had routed all rail traffic in the region north through Selkirk, and was eager to relieve itself of the bridge and adjoining rights-of-way. In 1984, it sold the entire property for one dollar to a felon who did not maintain it or pay taxes on it. The section of the corridor west of the Hudson was seized by Ulster County in 1991 and transferred to the town of Lloyd.
During the 1990s, a broadband utility seeking to lay fiber optic cable paid the town to pass through the former corridor. The town used part of its payment to pave the route and open it as a public rail trail in 1997. The creation of the trail was supported by a local Rotary club, which built a pavilion along the trail. The pavilion includes a donated antique caboose. While the trail originally ended at Route 4455, it was extended eastward between 2009 and 2010, intersecting Route 9W and continuing to the Poughkeepsie Bridge. The extension was paid for by stimulus funding.
The bridge, now a pedestrian walkway called Walkway Over the Hudson, connects the trail with the Dutchess Rail Trail to the east, creating a 30-mile (48 km) rail trail system that spans the Hudson. The trail is expected to be extended west, where it will border Route 299. As it passes through Highland, the trail is carried by several bridges, connects to four parking areas, and traverses a wetlands complex. The trail forms part of the proposed Empire State Trail.

Ex Output:
What is the full name of the structure that was damaged and became unusable after a fire in 1974?

Ex Input:
Passage: After his relationship with the other animals improved over the past nine months, Surly Squirrel is now loved by Liberty Park's Urban wildlife community, and currently overseeing an all-you-can-eat buffet at Maury's Nut Shop. This worries Andie, as she prefers a more hard-working outlook on life. Despite Surly's reassurances all is well, Maury's Nut Shop is accidentally blown up by Mole after he forgets to cut down pressure from the boiler. Andie takes the opportunity to try getting the animals back to their roots by foraging for food in Liberty Park while Surly and Buddy try to find other food-packed places, but fail each time. Defeated, he and Buddy decide to return to the park.
Meanwhile, Mayor Percival J. Muldoon, the unscrupulous Mayor of Oakton City, relishes in his wealth that comes from profit-making locations across Oakton City. However, he notices Liberty Park never makes money, so he decides to turn it into an Amusement Park named Libertyland to pocket more cash. Surly and Andie discover Muldoon's plot, and Surly convinces the animals to fight back, which they do successfully, and they manage to sabotage the construction worker's efforts to tear down the park.
That night, however, Surly's enjoyment is short-lived when Andie attempts to convince the animals to work hard for food as he believes it can result in disappointment. When the construction workers' foreman tells Muldoon about the animal attacks, he calls an extermination squad led by Gunther to get rid of the animals.
The next day, Surly gets caught in one of Gunther's traps, and the animals are pursued by Muldoon's dog, Frankie, who later falls in love with Precious. Surly and Buddy head out to rescue her while Andie and the rest find a new park.

Ex Output:
What does Muldoon want to turn into an amusement park?