Task: Question Generation
Input (English): Passage: William Etty (1787–1849), the seventh son of a York baker and miller, had originally been an apprentice printer in Hull, but on completing his seven-year apprenticeship in 1805 moved to London to become an artist. In January 1807 he was admitted to the Royal Academy Schools as a probationer, and in July of that year became a student of renowned portrait painter Thomas Lawrence, studying under him for a year.Strongly influenced by the works of Titian and Rubens, Etty became famous for painting nude figures in biblical, literary and mythological settings. He became well-respected for his ability to capture flesh tones accurately in painting, and for his fascination with contrasts in skin tones. Many of his peers greatly admired his work, and in February 1828 he defeated John Constable by 18 votes to five to become a full Royal Academician, at the time the highest honour available to an artist.Between 1820 and 1829 Etty exhibited 15 paintings, of which 14 depicted nude figures. While some nude paintings by foreign artists existed in private collections in England, the country had no tradition of nude painting and the display and distribution of nude material to the public had been suppressed since the 1787 Proclamation for the Discouragement of Vice.Etty was the first British artist to specialise in the nude, and the prurient reaction of the lower classes to these paintings caused concern throughout the 19th century. Although his portraits of male nudes were generally well received, many critics condemned his recurrent depictions of female nudity as indecent.
Output (English): What is the last name of the person who became well-respected for his fascination with contrasts in skin tones?