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: Before entering the studio, Metallica collected ideas on "riff tape" recordings of various jam sessions. Hetfield and Ulrich went through the tapes and selected the strongest riffs to assemble into songs. Instruments were recorded separately, with Hetfield playing only rhythm guitar. Rasmussen, with the support of drum roadie Flemming Larsen, taught the basics of timing and beat duration to Ulrich, who had a tendency to increase speed and had little knowledge of rhythm theory. Drums were recorded in an empty warehouse at the back of the studio, which was not soundproof, and caused reverberation. Although four tracks were already arranged, the band members were not used to creating songs in the studio, as they had not done so for Kill 'Em All. "For Whom the Bell Tolls", "Trapped Under Ice" and "Escape" were written from scratch in Copenhagen, and the band put finishing touches on "Fight Fire with Fire", "Ride the Lightning", "Creeping Death", and "The Call of Ktulu", which were already performed live. Lead guitarist Kirk Hammett took the album's name from a passage in Stephen King's novel The Stand. The cover art, displaying an electric chair in the midst of lightning bolts, was conceived before recording began. Metallica initially had sound problems, because its gear was stolen three weeks before the band arrived in Copenhagen. The band members slept in the studio by day as they could not afford a hotel and recorded by night, because the studio was booked by other artists during the daytime. Because the group was looking for a major label deal, several A&R representatives from different labels visited the studio. At first, it seemed that Metallica was going to sign with Bronze Records, but the deal fell through, because Bronze executive Gerry Bron did not appreciate the work done at Sweet Silence Studios, and wanted the US edition to be remixed by engineer Eddie Kramer, and even considered re-recording the album in another studio. Metallica was put off by Bron's failure to share the band's artistic vision and decided to look for another label for the US release, in spite of the fact that Bronze had already advertised Metallica as one of their bands.Metallica had to record quickly because of European shows scheduled 29 days after it entered the studio. Recording finished on March 14, and Megaforce released the album on July 27. Although the original album budget was $20,000, the final expense was above $30,000. Metallica's European label Music for Nations paid the studio costs because Megaforce owner Jon Zazula could not afford them. Metallica was unhappy with the lack of promotion by Megaforce, and decided to part ways with Zazula. Major label Elektra Records employee Michael Alago noticed Metallica at The Stone gig in San Francisco, and invited Elektra's chairman and the head of promotion to see the August show in New York. The performance at Roseland Ballroom, with Anthrax and Metallica opening for Raven, pleased the Elektra staff, and the band was offered a contract the following morning. On September 12, Metallica signed with Elektra, who re-released the album on November 19. Cliff Burnstein and Peter Mensch of Q Prime were concurrently appointed as the band's new managers. Ride the Lightning was the last Metallica album to feature co-writing contributions from former lead guitarist Dave Mustaine, who received credit on the title track and the instrumental "The Call of Ktulu". The album also represented the first time Hammett was given writing credits.

Ex Output:
What is the name of the album that represented the first time Hammett was given writing credits?

Ex Input:
Passage: The St. Johns River (Spanish: Rio San Juan) is the longest river in the U.S. state of Florida and its most significant one for commercial and recreational use. At 310 miles (500 km) long, it flows north and winds through or borders twelve counties. The drop in elevation from headwaters to mouth is less than 30 feet (9 m); like most Florida waterways, the St. Johns has a very low flow rate 0.3 mph (0.13 m/s) and is often described as "lazy". Numerous lakes are formed by the river or flow into it, but as a river its widest point is nearly 3 miles (5 km) across. The narrowest point is in the headwaters, an unnavigable marsh in Indian River County. The St. Johns drainage basin of 8,840 square miles (22,900 km2) includes some of Florida's major wetlands. It is separated into three major basins and two associated watersheds for Lake George and the Ocklawaha River, all managed by the St. Johns River Water Management District.
A variety of people have lived on or near the St. Johns, including Paleo-indians, Archaic people, Timucua, Mocama, French and Spanish settlers, Seminoles, slaves and freemen, Florida crackers, land developers, tourists and retirees. It has been the subject of William Bartram's journals, Marjorie Kinnan Rawlings' books, and Harriet Beecher Stowe's letters home. Although Florida was the location of the first permanent European settlement in what would become the United States, it was the last U.S. territory on the east coast to be developed; it remained an undeveloped frontier into the 20th century. When attention was turned to the state, however, much of the land was rapidly overdeveloped in a national zeal for progress. The St. Johns, like many Florida rivers, was altered to make way for agricultural and residential centers. It suffered severe pollution and human interference that has diminished the natural order of life in and around the river. In all, 3.5 million people live within the various watersheds that feed into the St. Johns River. The St. Johns, named one of 14 American Heritage Rivers in 1998, was number 6 on a list of America's Ten Most Endangered Rivers in 2008. Restoration efforts are under way for the basins around the St. Johns as Florida continues to deal with population increases in the river's vicinity.

Ex Output:
What state remained an undeveloped frontier into the 20th century?

Ex Input:
Passage: In Frankfurt, Rose established herself as a teacher of English; her earnings were supplemented by contributions from John Grainger, who had settled in Perth. The Hoch Conservatory's reputation for piano teaching had been enhanced by the tenure, until 1892, of Clara Schumann as head of piano studies. Grainger's piano tutor was James Kwast, who developed his young pupil's skills to the extent that, within a year, Grainger was being lauded as a prodigy. Grainger had difficult relations with his original composition teacher, Iwan Knorr; he withdrew from Knorr's classes to study composition privately with Karl Klimsch, an amateur composer and folk-music enthusiast, whom he would later honour as "my only composition teacher".Together with a group of slightly older British students Roger Quilter, Balfour Gardiner, Cyril Scott and Norman O'Neill, all of whom became his friends Grainger helped form the Frankfurt Group. Their long-term objective was to rescue British and Scandinavian music from what they considered the negative influences of central European music. Encouraged by Klimsch, Grainger turned away from composing classical pastiches reminiscent of Handel, Haydn and Mozart, and developed a personal compositional style, the originality and maturity of which quickly impressed and astonished his friends. At this time Grainger discovered the poetry of Rudyard Kipling and began setting it to music; according to Scott, "No poet and composer have been so suitably wedded since Heine and Schumann."After accompanying her son on an extended European tour in the summer of 1900, Rose, whose health had been poor for some time, suffered a nervous collapse and could no longer work. To replace lost income, Grainger began giving piano lessons and public performances; his first solo recital was in Frankfurt on 6 December 1900. Meanwhile he continued his studies with Kwast, and increased his repertoire until he was confident he could support himself and his mother as a concert pianist. Having chosen London as his future base, in May 1901 Grainger abandoned his studies. With Rose, he left Frankfurt for the UK.Before leaving Frankfurt, Grainger had fallen in love with Kwast's daughter Mimi. In an autobiographical essay dated 1947, he says that he was "already sex-crazy" at this time, when he was 19. John Bird, Grainger's biographer, records that during his Frankfurt years, Grainger began to develop sexual appetites that were "distinctly abnormal"; by the age of 16 he had started to experiment in flagellation and other sado-masochistic practices, which he continued to pursue through most of his adult life. Bird surmises that Grainger's fascination with themes of punishment and pain derived from the harsh discipline to which Rose had subjected him as a child.

Ex Output:
What was the full name of the composition teach John Grainger said he was "my only composition teacher"?