paragraph_text: The atmosphere of Venus is the layer of gases surrounding Venus. It is composed primarily of carbon dioxide and is much denser and hotter than that of Earth. The temperature at the surface is 740 K (467 ° C, 872 ° F), and the pressure is 93 bar (9.3 MPa), roughly the pressure found 900 m (3,000 ft) underwater on Earth. The Venusian atmosphere supports opaque clouds made of sulfuric acid, making optical Earth - based and orbital observation of the surface impossible. Information about the topography has been obtained exclusively by radar imaging. Aside from carbon dioxide, the other main component is nitrogen. Other chemical compounds are present only in trace amounts.

paragraph_text: Wolfgang Amadeus Mozart's six sonatas for keyboard with accompaniment of violin (or flute) and cello, K. 10–15 were composed in late 1764 in London during the Mozart family's grand tour of Europe. Queen Charlotte (the wife of King George III) commissioned them on 25 October and the works were dedicated on 18 January 1765. They were published as Mozart's "Opus III" by his father Leopold at 20 Frith Street, Soho, London, where the Mozarts lived from September 1764 until after May 1765.

paragraph_text: Mozart wrote this piece in pencil on the back of a circular by the Zürcher Musikkollegium (Zürich Music College) dated 30 September 1766, when the Mozart family came to the end of their Grand Tour. The circular invited sponsors, music lovers and other people who might be interested to concerts by "the young (9 years old) Master Mozart as well as his maiden sister" (Maria Anna – Nannerl) on October 7 and 9. It can be assumed that Mozart played or improvised this lively piece in one of those concerts, the programs to which are lost. Mozart wrote it on the back of the circular probably as a souvenir for the College's board; otherwise he would have used his sister's notebook or his third book of sketches (""), which is also lost. The autograph became known very late (in 1942), and so is missing from Alfred Einstein's 3rd edition of the Köchel catalogue.

paragraph_text: 920 Biography & genealogy 920 Biography, genealogy, insignia 921 - 928 This range is reserved as an optional location for biographies, which are shelved alphabetically by subject's last name. 929 Genealogy, names, insignia

paragraph_text: The International Who's Who in Music is a biographical dictionary and directory originally published by the International Biographical Centre located in Cambridge, England. It contains only biographies of persons living at the time of publication and includes composers, performers, writers, and some music librarians. The biographies included are solicited from the subjects themselves and generally include date and place of birth, contact information as well as biographical background and achievements.

paragraph_text: David DeFeis (born January 4, 1961) is an American singer, keyboard player, songwriter and producer. He is the main composer and leader of the heavy metal band Virgin Steele.

paragraph_text: Thomas Tomkins (1572 – 9 June 1656) was a Welsh-born composer of the late Tudor and early Stuart period. In addition to being one of the prominent members of the English Madrigal School, he was a skilled composer of keyboard and consort music, and the last member of the English virginalist school.

paragraph_text: Zulu Winter were a five piece indie rock band formed in London in 2011. The band consisted of Will Daunt (vocals & guitar), Iain Lock (backing vocals and bass), Dom Millard (keyboards), Henry Walton (guitar) and Guy Henderson (drums).

paragraph_text: Pickin' Up Pieces is the lead single from Brenda K. Starr's debut album, "I Want Your Love" released in 1985 on Mirage Records. Produced by Arthur Baker and co-written with Lotti Golden. "Pickin' Up Pieces" is a freestyle classic. The record peaked at #9 on the Billboard Hot Dance Club Play Charts and the Maxi Single's Chart helping Brenda K. Starr become the queen of Freestyle. "Pickin' Up Pieces" also cracked the R&B Hip Hop Billboard Charts. Freestyle, a dance genre, emerged in New York City, sharing musical and cultural elements with electro and hip hop.

paragraph_text: In his native Poland, in France, where he composed most of his works, and beyond, Chopin's music, his status as one of music's earliest superstars, his association (if only indirect) with political insurrection, his love life and his early death have made him, in the public consciousness, a leading symbol of the Romantic era. His works remain popular, and he has been the subject of numerous films and biographies of varying degrees of historical accuracy.

paragraph_text: Boys Will Be Joys is a 1925 American short silent comedy film directed by Robert F. McGowan. It was the 41st "Our Gang" short subject released.

paragraph_text: Donald James Winslow (1911 – 10 July 2010) was a professor at Boston University in Boston, United States who specialized in the subject of biography.

paragraph_text: City Scape is an orchestral piece composed by Jennifer Higdon in 2002 and commissioned by the Atlanta Symphony Orchestra. On November 14, 2002, the piece was premiered under the direction of Robert Spano. This piece dedicated to Robert Spano calls for a concerto grosso, in which 35 instruments are used; yet many of these instruments have featured solos that are scattered throughout the piece. The piece lasts a total of 31 minutes.

paragraph_text: The Five Pieces for Orchestra (Fünf Orchesterstücke), Op. 16, were composed by Arnold Schoenberg in 1909. The titles of the pieces, reluctantly added by the composer after the work's completion upon the request of his publisher, are as follows:

paragraph_text: Forchess is a four-player chess variant developed by T. K. Rogers, an American engineer. It uses one standard chessboard and two sets of standard pieces.

paragraph_text: Oliver Hilmes (born 1971 in Viersen, Germany) is a German author who has written several historical biographies. His study of Cosima Wagner, the daughter of the 19th century composer Franz Liszt and his biography of Alma Mahler a Viennese-born socialite, have been translated into English.

paragraph_text: Ask Grandma is a 1925 American short silent comedy film directed by Robert F. McGowan. It was the 39th "Our Gang" short subject released.

paragraph_text: Wolfgang Amadeus Mozart died after a short illness on 5 December 1791, aged 35. His reputation as a composer, already strong during his lifetime, rose rapidly in the years after his death, and he became (as he has remained to this day) one of the most celebrated of all composers.

paragraph_text: The Keyboard suite in D minor (HWV 437) was composed by George Frideric Handel, for solo keyboard (harpsichord), between 1703 and 1706. It is also referred to as " Vol. 2 No. 4". It was first published in 1733.

paragraph_text: Official Officers is a 1925 American short silent comedy film directed by Robert F. McGowan. It was the 40th "Our Gang" short subject released.

Question: Who was the main subject of biographies of the composer of Piece in F for Keyboard, K. 33b?
Answer: Wolfgang Amadeus Mozart