In this task, you're expected to write answers to questions involving multiple references to the same entity. The answer to the question should be unambiguous and a phrase in the paragraph. Most questions can have only one correct answer.

Passage: The hartebeest (; Alcelaphus buselaphus), also known as kongoni, is an African antelope. Eight subspecies have been described, including two sometimes considered to be independent species. A large antelope, the hartebeest stands just over 1 m (3.3 ft) at the shoulder, and has a typical head-and-body length of 200 to 250 cm (79 to 98 in). The weight ranges from 100 to 200 kg (220 to 440 lb). It has a particularly elongated forehead and oddly shaped horns, short neck, and pointed ears. Its legs, which often have black markings, are unusually long. The coat is generally short and shiny. Coat colour varies by the subspecies, from the sandy brown of the western hartebeest to the chocolate brown of the Swayne's hartebeest. Both sexes of all subspecies have horns, with those of females being more slender. Horns can reach lengths of 4570 cm (1828 in). Apart from its long face, the large chest and the sharply sloping back differentiate the hartebeest from other antelopes.
Gregarious animals, hartebeest form herds of 20 to 300 individuals. They are very alert and non-aggressive. They are primarily grazers, with their diets consisting mainly of grasses. Mating in hartebeest takes place throughout the year with one or two peaks, and depends upon the subspecies and local factors. Both males and females reach sexual maturity at one to two years of age. Gestation is eight to nine months long, after which a single calf is born. Births usually peak in the dry season. The lifespan is 12 to 15 years.
Question: What is the common English name of the animal that has eight subspecies?
African antelope.

Passage: Writing after the fall of Nojpeten, friar Cano described the ultimate fate of Diaz de Velasco and his companions; he claimed to have received the information from interviews with the soldiers from Yucatan who had stormed the Itza capital and from Ch'ol witnesses, although there were no Ch'ol at Nojpeten. Diaz's party arrived at the lakeshore and were told by local Itza that Franciscan friars were at Nojpeten. They were wary at first and asked for proof, upon which an Itza messenger brought them a rosary as a token. Looking across the lake they saw men dressed as friars calling to them to come across, these were Itza dressed in the habits of the two Franciscans who had recently been killed at the island. Diaz and his companions then boarded the Itza canoes, leaving thirty Maya porters with their mules and supplies.Once on the lake the Itza overturned some of the canoes and killed some of Diaz's men; others were wounded and dragged ashore to be killed. Diaz, the Dominicans and two other men were in a large canoe that was not overturned and were taken to Nojpeten where a fierce struggle ensued as Diaz attempted to defend himself with his sword, killing several Itzas. The two other men were immediately killed while the friars were beaten and tied to X-shaped crosses before having their hearts cut out. Across the lake, the Itza attacked the porters guarding the expedition supplies and killed all of them. The Itza killed a total of 87 expedition members, including 50 soldiers, two Dominicans and about 35 Maya helpers. The remains of the small group that were killed on Nojpeten were later retrieved by the Spanish after the fall of the city and were taken back to Santiago de los Caballeros de Guatemala for burial.
Question: What is the first name of the leader of the party that were wary at first and asked for proof?
Diaz.

Passage: American music critic and journalist Harold C. Schonberg wrote of Tchaikovsky's "sweet, inexhaustible, supersensuous fund of melody," a feature that has ensured his music's continued success with audiences. Tchaikovsky's complete range of melodic styles was as wide as that of his compositions. Sometimes he used Western-style melodies, sometimes original melodies written in the style of Russian folk song; sometimes he used actual folk songs. According to The New Grove, Tchaikovsky's melodic gift could also become his worst enemy in two ways. The first challenge arose from his ethnic heritage. Unlike Western themes, the melodies that Russian composers wrote tended to be self-contained; they functioned with a mindset of stasis and repetition rather than one of progress and ongoing development. On a technical level, it made modulating to a new key to introduce a contrasting second theme exceedingly difficult, as this was literally a foreign concept that did not exist in Russian music. The second way melody worked against Tchaikovsky was a challenge that he shared with the majority of Romantic-age composers. They did not write in the regular, symmetrical melodic shapes that worked well with sonata form, such as those favored by Classical composers such as Haydn, Mozart or Beethoven, but were complete and independent in themselves. This completeness hindered their use as structural elements in combination with one another. This challenge was why the Romantics "were never natural symphonists". All a composer like Tchaikovsky could do with them was to essentially repeat them, even when he modified them to generate tension, maintain interest and satisfy listeners.
Question: What is the name of the person who sometimes used original melodies written in the style of Russian folk song?
Tchaikovsky.