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.

Ex Input:
Passage: Paul Helfeld (also given as Hefeld), aged 21 in 1909, and Jacob Lepidus (also reported as Lapidus), who was 25 the same year, were Jewish-Latvian immigrants. They had been members of the Latvian Socialist Party and, although they had not held positions of responsibility, they had smuggled revolutionary literature into Russia for the party. The pair had been living in Paris in 1907, along with Lepidus's brother Paul, a revolutionary bomber who went under the nom de guerre "Strygia"; Jacob was described in The Times as a "member of a notorious Russian revolutionary family". On 1 May 1907 Paul Lepidus was killed when a bomb he was carrying to assassinate Armand Fallières, the President of France, exploded prematurely. Lepidus and Helfeld fled the country and lived in Scotland for a year, before moving to Tottenham.Both men joined a small group of Latvian agitators living in north London; according to other members of the group, the pair had criminal records and had joined as a cover for the robberies they carried out. Lepidus was employed, briefly, at a furniture factory, while Helfeld took a job at the Schnurmann rubber factory in Tottenham. Helfeld refused to give his name when he joined the company, so he was listed on the time sheets as "Elephant" in reference to his bulk. Situated on the corner of Tottenham High Road and Chesnut Road, the factory sat opposite Tottenham Police Station, which was under the control of the Metropolitan Police.Special Branch suspected another individual, the Russian revolutionary Christian Salnish, of having organised the robbery. Salnish, who often went under the name Jacob Fogel, had been an active revolutionary since the age of 13. He participated in the 1905 Russian Revolution and afterwards helped to build resistance groups in the Baltic states and Saint Petersburg, then the capital of Imperial Russia. Special Branch suspected a political element to the crime based on Salnish's involvement, but as both Helfeld and Lepidus died during the chase, the motivation for the crime was never established. 
Question: What is the first name of Paul's brother?

Ex Output:
Jacob.


Ex Input:
Passage: A number of performers and groups, including several early leaders, have been recognized for their contributions to taiko performance. Daihachi Oguchi was best known for developing kumi-daiko performance. Oguchi founded the first kumi-daiko group called Osuwa Daiko in 1951, and facilitated the popularization of taiko performance groups in Japan.Seidō Kobayashi is the leader of the Tokyo-based taiko group Oedo Sukeroku Taiko as of December 2014. Kobayashi founded the group in 1959 and was the first group to tour professionally. Kobayashi is considered a master performer of taiko. He is also known for asserting intellectual control of the group's performance style, which has influenced performance for many groups, particularly in North America.In 1968, Seiichi Tanaka founded the San Francisco Taiko Dojo and is regarded as the Grandfather of Taiko and primary developer of taiko performance in the United States. He was a recipient of a 2001 National Heritage Fellowship awarded by the National Endowment for the Arts  and since 2013 is the only taiko professional presented with the Order of the Rising Sun 5th Order: Gold and Silver Rays by Emperor Akihito of Japan, in recognition of Grandmaster Seiichi Tanaka's contributions to the fostering of US-Japan relations as well as the promotion of Japanese cultural understanding in the United States.In 1969, Den Tagayasu (田耕, Den Tagayasu) founded Ondekoza, a group well known for making taiko performance internationally visible and for its artistic contributions to the tradition. Den was also known for developing a communal living and training facility for Ondekoza on Sado Island in Japan, which had a reputation for its intensity and broad education programs in folklore and music.Performers and groups beyond the early practitioners have also been noted. Eitetsu Hayashi is best known for his solo performance work. Hayashi joined Ondekoza when he was 19, and after parting from the group helped found Kodo, one of the best known and most influential taiko performance groups in the world. Hayashi soon left the group to begin a solo career and has performed in venues such as Carnegie Hall in 1984, the first featured taiko performer there. He was awarded the 47th Education Minister's Art Encouragement Prize, a national award, in 1997 as well as the 8th Award for the Promotion of Traditional Japanese Culture from the Japan Arts Foundation in 2001. 
Question: What group is known for its artistic contributions to the tradition?

Ex Output:
Ondekoza.


Ex Input:
Passage: Elvis Aaron Presley (January 8, 1935 – August 16, 1977) was an American singer and actor. Regarded as one of the most significant cultural icons of the 20th century, he is often referred to as the "King of Rock and Roll" or simply "the King".
Presley was born in Tupelo, Mississippi, and relocated to Memphis, Tennessee, with his family when he was 13 years old. His music career began there in 1954, recording at Sun Records with producer Sam Phillips, who wanted to bring the sound of African-American music to a wider audience. Accompanied by guitarist Scotty Moore and bassist Bill Black, Presley was a pioneer of rockabilly, an uptempo, backbeat-driven fusion of country music and rhythm and blues. In 1955, drummer D. J. Fontana joined to complete the lineup of Presley's classic quartet and RCA Victor acquired his contract in a deal arranged by Colonel Tom Parker, who would manage him for more than two decades. Presley's first RCA single, "Heartbreak Hotel", was released in January 1956 and became a number-one hit in the United States. With a series of successful network television appearances and chart-topping records, he became the leading figure of the newly popular sound of rock and roll. His energized interpretations of songs and sexually provocative performance style, combined with a singularly potent mix of influences across color lines during a transformative era in race relations, made him enormously popular—and controversial.
In November 1956, Presley made his film debut in Love Me Tender. Drafted into military service in 1958, Presley relaunched his recording career two years later with some of his most commercially successful work. He held few concerts however, and guided by Parker, proceeded to devote much of the 1960s to making Hollywood films and soundtrack albums, most of them critically derided. In 1968, following a seven-year break from live performances, he returned to the stage in the acclaimed television comeback special Elvis, which led to an extended Las Vegas concert residency and a string of highly profitable tours. In 1973, Presley gave the first concert by a solo artist to be broadcast around the world, Aloha from Hawaii. Years of prescription drug abuse severely compromised his health, and he died suddenly in 1977 at his Graceland estate at the age of 42.
Presley is the best-selling solo artist in the history of recorded music. He was commercially successful in many genres, including pop, country, blues, and gospel. He won three competitive Grammys, received the Grammy Lifetime Achievement Award at age 36, and has been inducted into multiple music halls of fame. 
Question: What is the last name of the person who became the leading figure of the newly popular sound of rock and roll?

Ex Output:

Presley.