Question: Sergei Rachmaninoff's Symphony No. 1 was influenced by what Georgian doctor?
Context: Caprice bohémien, Op.  12 is a symphonic poem for orchestra composed by Sergei Rachmaninoff in 1892-1894.  An earlier example of Rachmaninoff's compositions, the piece consists of many moments played in full "a tutti", which was the same bombastic approach that critics would lambast with his next composition, Symphony No. 1 in D minor.  "Caprice bohémien" was better received than his first symphony, which gained respect only after the composer's death. Sergei Rachmaninoff composed his Symphony No. 3 in A minor, Op. 44 between 1935 and 1936.  The Third Symphony is considered a transitional work in Rachmaninoff's output.  In melodic outline and rhythm it is his most expressively Russian symphony, particularly in the dance rhythms of the finale.  What was groundbreaking in this symphony was its greater economy of utterance compared to its two predecessors.  This sparer style, first apparent in the "Rhapsody on a Theme of Paganini", enhances the emotional power of the work. Villa Senar is an estate built in Switzerland by the Russian composer Sergei Rachmaninoff.  He purchased the plot of land near Hertenstein near Lake Lucerne in 1932.  The name of the estate originated from the names of Rachmaninoff and his wife: Sergei and Natalia, by combining the first two letters of each given name and the first of their surname.  The villa was designed to remind Rachmaninoff of the estate of Ivanovka the family had in southern Russia before the October Revolution and their migration to Western Europe in 1918.  A park and a magnificent rose garden were laid at Senar.  The Rachmaninoffs spent every summer at Senar until their final migration to the United States in 1939 at the outbreak of World War II.  Two of Rachmaninoff's major compositions were written at Senar: "Rhapsody on a Theme of Paganini" completed in 1934 and the Third symphony completed in 1936.  The villa hosted famous Russian immigrants, including Ivan Bunin and Vladimir Horowitz. Symphony No. 2 in E minor, Op. 27 is a symphony by the Russian composer Sergei Rachmaninoff, written in 1906–07.  The premiere was conducted by the composer himself in Saint Petersburg on 8 February 1908.  Its duration is approximately 60 minutes when performed uncut; cut performances can be as short as 35 minutes.  The score is dedicated to Sergei Taneyev, a Russian composer, teacher, theorist, author, and pupil of Pyotr Ilyich Tchaikovsky.  Alongside his Piano Concerto No. 2 and Piano Concerto No. 3, this symphony remains one of the composer's best known compositions. Alexander Porfiryevich Borodin (Russian: Алекса́ндр Порфи́рьевич Бороди́н ; ] , 12 November 183327 February 1887) was a Russian Romantic composer of Georgian origin, as well as a doctor and chemist.  He was one of the prominent 19th century composers known as The Mighty Handful, a group dedicated to producing a uniquely Russian kind of classical music, rather than imitating earlier Western European models. Piano Sonata No. 1 in D minor, Op.  28, is a piano sonata by Sergei Rachmaninoff, completed in 1908.  It is the first of three "Dresden pieces", along with Symphony No. 2 and part of an opera, which were composed in the quiet city of Dresden, Germany.  It was originally inspired by Goethe's tragic play "Faust"; although Rachmaninoff abandoned the idea soon after beginning composition, traces of this influence can still be found.  After numerous revisions and substantial cuts made at the advice of his colleagues, he completed it on April 11, 1908.  Konstantin Igumnov gave the premiere in Moscow on October 17, 1908.  It received a lukewarm response there, and remains one of the least performed of Rachmaninoff's works. Russian composer Sergei Rachmaninoff's Symphony No. 1 in D minor, his Op.  13, was composed between January and October 1895 at his Ivanovka estate near Tambov, Russia.  Despite its poor initial reception the symphony is now seen as a dynamic representation of the Russian symphonic tradition, with British composer Robert Simpson calling it "a powerful work in its own right, stemming from Borodin and Tchaikovsky, but convinced, individual, finely constructed, and achieving a genuinely tragic and heroic expression that stands far above the pathos of his later music." The Bells (Russian: Колокола , "Kolokola"), Op. 35, is a choral symphony by Sergei Rachmaninoff, written in 1913.  The words are from the poem "The Bells" by Edgar Allan Poe, very freely translated into Russian by the symbolist poet Konstantin Balmont.  The traditional Gregorian melody "Dies Irae" is used frequently throughout the work.  It was one of Rachmaninoff's two favorite compositions, along with his "All-Night Vigil", and is considered by some to be his secular choral masterpiece.  Rachmaninoff called the work both a choral symphony and (unofficially) his Third Symphony shortly after writing it; however, he would later write a purely instrumental Third Symphony during his years in exile.  Rachmaninoff dedicated "The Bells" to Dutch conductor Willem Mengelberg and the Concertgebouw Orchestra. The Rhapsody on a Theme of Paganini, Op.  43, (Russian: Рапсодия на тему Паганини , "Rapsodiya na temu Paganini") is a concertante work written by Sergei Rachmaninoff.  It is written for solo piano and symphony orchestra, closely resembling a piano concerto.  The work was written at his Villa, the Villa Senar, in Switzerland, according to the score, from July 3 to August 18, 1934.  Rachmaninoff himself, a noted interpreter of his own works, played the solo piano part at the piece's premiere at the Lyric Opera House in Baltimore, Maryland, on November 7, 1934 with the Philadelphia Orchestra, conducted by Leopold Stokowski.  Rachmaninoff, Stokowski, and the Philadelphia Orchestra made the first recording, on December 24, 1934, at RCA Victor's Trinity Church Studio in Camden, New Jersey. Eleonora Grigor'yevna Eksanishvili (Yeksanishvili) (born February 11, 1919) is a Georgian pianist, music educator and composer.  Examples of her compositions are two children's opera, a "concerto" for piano and orchestra, and a "Piano Quintet".  She published an article which is featured in the book "Sergei Rachmaninoff: a bio-bibliography" on a Rachmaninoff's visit to Tbilisi, the capital of Georgia.
Answer: Alexander Porfiryevich Borodin