Question: Who was the father of a dancer who perfromed Acro Dance?

full_context: Document 1: Adagio (acrobatics): Adagio is the performance of partner acrobalance poses and associated movements that involve stationary balances by a pair of performers. It is performed in professional circus, in various dance disciplines including acro dance and ballet, in pair skating, and as a hobby in university circus groups.
Document 2: Kristina Svechinskaya: Kristina Vladimirovna Svechinskaya (Russian: Кристина Владимировна Свечинская , born February 16, 1989) is a former Russian money mule hacker. A student of the New York University, in 2010 she was accused of a plot to defraud several British and U.S. banks of sizeable sums and usage of false passports. According to charges, Svechinskaya used Zeus trojan horse to attack thousands of bank accounts and opened at least five accounts in Bank of America and Wachovia, which received $35,000 (£22,000) of money theft. It is estimated that with nine other people Svechinskaya had skimmed $3 million in total. Svechinskaya was dubbed by the media "the world's sexiest computer hacker" for her raunchy, but casual appearance and was compared to Anna Chapman. The upcoming Russian film "Botnet" is partially based on Svechinskaya's story.
Document 3: Natalia Vorobieva: Natalia Vitalyevna Vorobieva (Russian: Наталья Витальевна Воробьёва ; born 27 May 1991 in Tulun, Irkutsk oblast, Russian SFSR, Soviet Union) is a Russian wrestler, who competed at the 2012 Summer Olympics. Vorobieva reached the finals in the 72 kg category where she beat Stanka Zlateva of Bulgaria to win the gold medal. She is also the holder of a number of titles at the youth levels. In the 2015 Golden Grand Prix Ivan Yarygin final match, Vorobyeva defeated Ochirbatyn Nasanburmaa of Mongolia. Vorobyeva train with UFC and M-1 Global MMA fighters, such as Khabib Nurmagomedov, Islam Makhachev, Vyacheslav Vasilevsky, Abubakar Nurmagomedov, Mikhail Malyutin, Ali Bagov.
Document 4: Front aerial: A front aerial is an acrobatic move in which a person executes a complete forward revolution of the body without touching the floor. Front aerials are performed in various physical activities, including acro dance and gymnastics. The front aerial is known by other names, including "aerial walkover" and "front aerial walkover".
Document 5: Contemporary dance: Contemporary dance is a dance performance genre that developed during the mid twentieth century and has since grown to become one of the dominant genres for formally trained dancers throughout the world, with particularly strong popularity in the U.S. and Europe. Although originally informed by and borrowing from classical, modern, and jazz styles, it has since come to incorporate elements from many styles of dance. Due to its technical similarities, it is often perceived to be closely related to modern dance, ballet and other classical concert dance styles.
Document 6: Kateryna Babkina: Kateryna Babkina () (born 22 July 1985 in Ivano-Frankivsk) is young and established Ukrainian writer and screenwriter. She’s an author of four poetry collections (St.Elmo’s fires 2002, The Mustard 2011, Painkillers and Sleeping pills 2014, Charmed for love 2017), one novel (Sonia, 2013) and two collections of stories (Leloo after you, 2008 and Happy naked people 2016). She has also written 2 books for kids, which are extremely popular in Ukraine, the last one, The Cappy and the whale, dedicated to cancer sick kids became a big charity project in Ukraine and caused a huge wave of fun-art like toys, candies, posters, t-shirts and sweaters collection and even tattoos.
Document 7: Moscow State Aviation Technological University: Moscow State Aviation Technological University is a university in Moscow, Russia. The modern name of this university is «MATI» - Russian State University of Aviation Technology (Russian: Российский государственный технологический университет им. К.Э.Циолковсокого ). It is named after the Russian aeronautics and rocketry pioneer Konstantin Eduardovich Tsiolkovskii.
Document 8: Choreography: Choreography is the art or practice of designing sequences of movements of physical bodies (or their depictions) in which motion, form, or both are specified. "Choreography" may also refer to the design itself. A choreographer is one who creates choreographies by practicing the art of choreography, a process known as "choreographing". Choreography is used in a variety of fields, including musical theater, cheerleading, cinematography, gymnastics, fashion shows, ice skating, marching band, show choir, theatre, synchronized swimming, cardistry, video game production and animated art. In the performing arts, choreography applies to human movement and form. In dance, choreography is also known as dance choreography or "dance composition".
Document 9: Katerina Tikhonova: Katerina Vladimirovna Tikhonova (born 31 August 1986) is the daughter of Vladimir Putin, an acrobatic dancer, and director of two initiatives at Moscow State University, the National Intellectual Development Foundation (NIDF) and the National Intellectual Reserve Centre (NIRC). She is also the director of Innopraktika, a $1.7 billion development project to create a science center at Moscow State University. Innopraktika is competing with the Skolkovo Innovation Center and is referred to by Stanislav Belkovsky as being the "anti-Skolkovo". Tikhonova dropped Putin's surname and took the patronymic name of her maternal grandmother, Yekaterina Tikhonovna Shkrebneva, as her surname.
Document 10: Fusion dance: Fusion dance is a type of contemporary American partner dance that combines different dance styles to create a new aesthetic. It is typically an improvised, lead-follow approach to dancing that does not conform to any particular defined dance styles. Fusion dancing may involve creating a new dance style, combining existing styles, or both.
Document 11: Flip (acrobatic): An acrobatic flip is a sequence of body movements in which a person leaps into the air and then rotates one or more times while airborne. Acrobatic flips are performed in acro dance, free running, gymnastics, cheerleading and various other activities. This is in contrast to freestyle BMX, in which a person revolves in the air about a bicycle.
Document 12: Acro dance: Acro dance is a style of dance that combines classical dance technique with precision acrobatic elements. It is defined by its athletic character, its unique choreography, which seamlessly blends dance and acrobatics, and its use of acrobatics in a dance context. It is a popular dance style in amateur competitive dance as well as in professional dance theater and in contemporary circus productions such as those by Cirque du Soleil. This is in contrast to acrobatic, artistic and rhythmic gymnastics, which are sports that employ dance elements in a gymnastics context under the auspices of a governing gymnastics organization (such as FIG) and subject to a Code of Points. Acro dance is known by various other names including "acrobatic dance" and "gymnastic dance", though it is most commonly referred to simply as "acro" by dancers and dance professionals.
Document 13: Vladimir Yakunin: Vladimir Ivanovich Yakunin (Russian: Владимир Иванович Якунин ; born June 30, 1948 in Melenki, Vladimir Oblast) is a Russian public figure, businessman and former president of Russian Railways (June 2005 – August 2015). In 2012 he was elected chairman of the Union of Railways (UIC) a position he held until 2015. In March 2014 he was placed on the US State Department's list of Russian officials and businessmen sanctioned in the wake the annexation of Crimea. After stepping down as head of Russian Railways he has continued to be engaged in public work as a founder and president of World Public Forum “Dialogue of Civilizations”. In October 2015 he started work on creating an international think tank focused on the search for solutions to help de-escalate tensions across the world. DOC Research Institute was launched in July 2016 in Berlin
Document 14: Katusha Demidova: Katusha Demidova is a Russian professional ballroom dancer and instructor, now residing in the USA. She is the 2009, 2010, 2011, 2012, 2013 and 2014 Professional World Ballroom Dance Champion, and also the International Professional, and British Open, Ballroom Champion. Her partner in these events was Arunas Bizokas. She is the sister of Anna Demidova who is also a dancer.
Document 15: Sofia Kovalevskaya Award: The Alexander von Humboldt Foundation of Germany bestows the Sofia Kovalevskaya Award every two years. Sofia Kovalevskaya (1850–1891) was the first major Russian female mathematician, who made important contributions to mathematical analysis, differential equations and mechanics, and the first woman appointed to a full professorship in Northern Europe. This prestigious award named in her honor is given to promising young academics to pursue their line of research in the sciences or arts and humanities. The foundation encourages applications from all areas of the academy so long as the investigator received a Ph.D. in the last six years and may be categorized as "top flight" by their publications and experience as commensurate with age.
ground_truth: Vladimir Putin