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.

[Q]: 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 (5–6 hours, anywhere on rim), Bristlecone Loop (one hour, Rainbow Point), and Queens Garden (1–2 hours, Sunrise Point) are easy to moderate hikes. Navajo Loop (1–2 hours, Sunset Point) and Tower Bridge (2–3 hours, north of Sunrise Point) are moderate hikes. Fairyland Loop (4–5 hours, Fairyland Point) and Peekaboo Loop (3–4 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.
[A]: Which hiking trail in Bryce Canyon has the longest estimated hiking time?


[Q]: Passage: After almost three years of touring to promote Metallica, including a headlining performance at Woodstock '94, Metallica returned to the studio to write and record its sixth studio album. The band went on a brief hiatus in the summer of 1995 and played a short tour, Escape from the Studio '95, comprising three outdoor shows, including a headline show at Donington Park supported by Slayer, Skid Row, Slash's Snakepit, Therapy?, and Corrosion of Conformity. The band spent about a year writing and recording new songs, resulting in the release of Load in 1996. Load debuted at number one on the Billboard 200 and ARIA Charts; it was the band's second number-one album. The cover art, Blood and Semen III, was created by Andres Serrano, who pressed a mixture of his own semen and blood between sheets of plexiglass. The release marked a change in the band's musical direction and a new image; the bandmembers' hair was cut. Metallica headlined the alternative rock festival Lollapalooza festival in mid-1996.
During early production of the album, the band had recorded enough material to fill a double album. It was decided that half of the songs were to be released; the band would continue to work on the remaining songs and release them the following year. This resulted in follow-up album titled Reload. The cover art was again created by Serrano, this time using a mixture of blood and urine. Reload debuted at number one on the Billboard 200 and reached number two on the Top Canadian Album chart. Hetfield said in the 2004 documentary film Some Kind of Monster that the band initially thought some of the songs on these albums were of average quality; these were "polished and reworked" until judged releasable. To promote Reload, Metallica performed "Fuel" and "The Memory Remains" with Marianne Faithfull on NBC's Saturday Night Live in December 1997.In 1998, Metallica compiled a double album of cover songs, Garage Inc. The first disc contained newly recorded covers of songs by Diamond Head, Killing Joke, the Misfits, Thin Lizzy, Mercyful Fate, Black Sabbath, and others. The second disc featured the original version of The $5.98 E.P.: Garage Days Re-Revisited, which had become a scarce collectors' item. The album entered the Billboard 200 at number two.On April 21 and 22, 1999, Metallica recorded two performances with the San Francisco Symphony conducted by Michael Kamen, who had previously worked with producer Rock on "Nothing Else Matters". Kamen approached Metallica in 1991 with the idea of pairing the band's music with a symphony orchestra. Kamen and his staff of over 100 composed additional orchestral material for Metallica songs. Metallica wrote two new Kamen-scored songs for the event, "No Leaf Clover" and "-Human". The audio recording and concert footage were released in 1999 as the album and concert film S&M. It entered the Billboard 200 at number two and the Australian ARIA charts and Top Internet Albums chart at number one.
[A]: What three bodily fluids did Serrano use for the album cover art for Reload and Load?


[Q]: Passage: Chaco Canyon lies at the geographic center of the San Juan Basin. It is located in northwestern New Mexico 60 miles (97 km) north of Interstate 40 and 130 miles (210 km) from Gallup, the nearest city. The continental divide is 20 miles (32 km) east. Chaco Canyon was created by the Chaco River, which cut several hundred feet into Chacra Mesa. The elevation of the sandstone canyon and the surrounding high-desert terrain is approximately 6,000 feet (1,800 m). Though most of the Chacoan sites are located at the bottom of the canyon, the group also includes some ruins not in the canyon proper, extending 35 miles (56 km) from Kin Ya'a in the south to Pueblo Alto in the north, and 20 miles (32 km) from Pueblo Pintado to the northeast and Peñasco Blanco in the southwest. In terms of water drainage and cultural affinity, the area is part of the San Juan Basin, which includes Mesa Verde in Colorado and Kayenta, Arizona.Chetro Ketl lies 0.4 miles (0.64 km) east of Pueblo Bonito, in an area that archeologists call downtown Chaco. Scholars theorize that the area may be an ancestral sacred zone demarcated by a low masonry wall that encloses Chetro Ketl, Pueblo Bonito, and Pueblo del Arroyo. Chetro Ketl's position is symmetrical to Pueblo Bonito; the buildings are equidistant from a north-south axis that runs across the canyon. Anna Sofaer proposed that many of the great houses in Chaco Canyon were constructed to emphasize astronomical alignments; during the minor lunar standstill, the full moon rises along Chetro Ketl's back wall.Chetro Ketl is located opposite a large opening in the canyon known as South Gap, which helped maximize the building's exposure to the sun while increasing visibility and access to the south. Its rear wall runs parallel to the canyon, and at less than 100 feet (30 m) from the cliffs its proximity allowed inhabitants to benefit from passive solar energy emanating from the rocks. Chetro Ketl is not perfectly aligned to the cardinal directions, but its nominal southerly orientation further enhanced solar exposure to its tiered rooms.
[A]:
What elevation and the surrounding high-desert terrain is approximately 6,000 feet?