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: An inventory of medium and large mammals in the park confirmed the presence of 30 species in Saguaro National Park between 1999 and 2008. Of these, 21 were found in the Tucson Mountain District and 29 in the Rincon Mountain District. A partial list of the park's mammals includes cougars, coyotes, bobcats, white-tailed deer, mule deer, javelinas, gray foxes, black-tailed jackrabbits, desert cottontails, ring-tailed cats, white-nosed coatis, ground squirrels, and packrats. One endangered mammal, the lesser long-nosed bat, lives part of the year in the park and part of the year in Mexico.The wide range of habitats in the park supports a diverse population of birds including some, such as the vermilion flycatcher and the whiskered screech owl, uncommon elsewhere in the United States. Among the park's 107 bird species are great horned owls, cactus wrens, ravens, kestrels, turkey vultures, roadrunners, woodpeckers, hawks, quails, and hummingbirds, and one threatened species, the Mexican spotted owl.The park's 36 reptile species include desert tortoises, diamondback rattlesnakes (one of the more commonly seen snakes), coral snakes, Gila monsters, short-horned lizards, spiny lizards, and zebra-tailed lizards. Despite the aridity, three amphibian species inhabit the park: the canyon tree frog, the lowland leopard frog, and Couch's spadefoot, which lives in underground burrows, emerging to breed during summer rains. Forest fires, which create erosion-prone burned areas, have destroyed many of the leopard frog's breeding pools, which fill with sediment. The Arizona Game and Fish Department lists the lowland leopard frog as a species of special concern.Urban sprawl, air and water pollution, noise, light pollution, and a range of habitat restricted by human infrastructure put stress on the park's mammals and other animals, but the most serious immediate threat to them is roadkill. About 50,000 vertebrates a year die on the park's roads when they are hit by a vehicle. The Rincon Mountain District has few roads, but Picture Rocks Road, an east–west commuter highway crossing the Tucson Mountain District, is highly dangerous to wildlife. Attempts in 2002 to convert it to a hiking trail failed after the proposal met with stiff public resistance.
[EX A]: What was attempted to be converted into a hiking trail?

[EX Q]: Passage: Carl Wilson famously compared Smiley Smile to "a bunt instead of a grand slam". From the vast sum of material Brian had recorded for Smile, only portions of the backing track for "Heroes and Villains" (recorded October 1966) and the coda for "Vegetables" (recorded April 1967) were used for Smiley Smile. "Heroes and Villains" was modified substantially during the Smiley Smile sessions before being issued as a single preceding the album's release. Comparing Brian's original Smile mixes with the single version, Al Jardine called it "a pale facsimile ... Brian re-invented the song for this record ... He purposefully under-produced the song." "Good Vibrations", which was recorded sporadically from February to September 1966, appears with no differences from the original single. Brian reportedly objected to the placement of "Good Vibrations" on Smiley Smile, but for the first time, he was outvoted by his bandmates, who insisted on its inclusion."Wind Chimes", "Wonderful", and most parts of "Vegetables" were completely rerecorded with dramatically scaled-down arrangements. "Vegetables" was reworked as a kind of campfire song,  "Wonderful" traded its harpsichord, strings, and horns with a haphazardly-played organ, high-pitched backing vocals, and a doo-wop sing-along section, and the marimbas in "Wind Chimes" were replaced by organ and dissonant noise. Other tracks took elements of Smile era compositions to make something slightly different; "She's Goin' Bald" borrows the verse melody from a Smile fragment known as "He Gives Speeches", "With Me Tonight" is a variation on  "Vegetables", and "Fall Breaks and Back to Winter (W. Woodpecker Symphony)" lifts a recurring melodic hook from "Fire". David Anderle thought that "what Brian tried to do with Smiley Smile is he tried to salvage as much of Smile as he could and at the same time immediately go into his [long-discussed] humor album." Jardine felt that "there are some pretty cool songs on that album but I didn't like rehashing some of the Smile songs. That didn't work for me."Smiley Smile was produced without any direct involvement from Van Dyke Parks. The only songs that appeared to have no connection to the original Smile album were "Little Pad" and "Gettin' Hungry". In addition, while the Beatles' Paul McCartney was present at an April 1967 session for "Vegetables", the recording where he allegedly provides celery biting sounds was not used on Smiley Smile.
[EX A]: What is the full name of the person who allegedly provided celery biting sounds in a recording session that were ultimately not used on Smiley Smile?

[EX Q]: Passage: In 2001, President George W. Bush discussed  an accord with Mexican President Vincente Fox. Possible accord was derailed by the September 11 attacks. From 2005 to 2013, the US Congress discussed various ways of controlling immigration. The Senate and House were unable to reach an agreement.Nearly 14 million immigrants entered the United States from 2000 to 2010, and over one million persons were naturalized as U.S. citizens in 2008. The per-country limit applies the same maximum on the number of visas to all countries regardless of their population and has therefore had the effect of significantly restricting immigration of persons born in populous nations such as Mexico, China, India, and the Philippines—the leading countries of origin for legally admitted immigrants to the United States in 2013; nevertheless, China, India, and Mexico were the leading countries of origin for immigrants overall to the United States in 2013, regardless of legal status, according to a U.S. Census Bureau study. As of 2009, 66% of legal immigrants were admitted on the basis of family ties, along with 13% admitted for their employment skills and 17% for humanitarian reasons.Nearly 8 million people immigrated to the United States from 2000 to 2005; 3.7 million of them entered without papers.  In 1986 president Ronald Reagan signed immigration reform that gave amnesty to 3 million undocumented immigrants in the country. Hispanic immigrants suffered job losses during the late-2000s recession, but since the recession's end in June 2009, immigrants posted a net gain of 656,000 jobs. Over 1 million immigrants were granted legal residence in 2011.For those who enter the US illegally across the Mexico–United States border and elsewhere, migration is difficult, expensive and dangerous. Virtually all undocumented immigrants have no avenues for legal entry to the United States due to the restrictive legal limits on green cards, and lack of immigrant visas for low-skilled workers. Participants in debates on immigration in the early twenty-first century called for increasing enforcement of existing laws governing illegal immigration to the United States, building a barrier along some or all of the 2,000-mile (3,200 km) Mexico-U.S. border, or creating a new guest worker program. Through much of 2006 the country and Congress was immersed in a debate about these proposals. As of April 2010 few of these proposals had become law, though a partial border fence had been approved and subsequently canceled.
[EX A]:
What two countries had a possible accord that was derailed by the September 11 attacks?