Question: How many oil paintings were created by the artist that painted Peasant Woman Against a Background of Wheat?

full_context: Document 1: Wil van Gogh: Wilhelmina Jacoba "Wil" van Gogh (] ; 16 March 1862 – 17 May 1941) was a nurse and early feminist. She is best known as the youngest sister of the artist Vincent van Gogh and the art dealer Theo van Gogh.
Document 2: Almond Blossoms: Almond Blossoms is from a group of several paintings made in 1888 and 1890 by Vincent van Gogh in Arles and Saint-Rémy, southern France of blossoming almond trees. Flowering trees were special to van Gogh. They represented awakening and hope. He enjoyed them aesthetically and found joy in painting flowering trees. The works reflect the influence of Impressionism, Divisionism, and Japanese woodcuts. "Almond Blossom" was made to celebrate the birth of his nephew and namesake, son of his brother Theo and sister-in-law Jo.
Document 3: Early works of Vincent van Gogh: The early works of Vincent van Gogh is a group of paintings and drawings that Vincent van Gogh made when he was 27 and 28, in 1881 and 1882, his first two years of serious artistic exploration. Over the course of the two-year period Van Gogh lived in several places. He left Brussels, where he had studied for about a year in 1881, to return to his parent's home in Etten (North Brabant), where he made studies of some of the residents of the town. In January 1882 Van Gogh went to The Hague where he studied with his cousin-in-law Anton Mauve and set up a studio, funded by Mauve. During the ten years of Van Gogh's artistic career from 1881 to 1890 Vincent's brother Theo would be a continuing source of inspiration and financial support; his first financial support began in 1880 funding Vincent while he lived in Brussels.
Document 4: Vincent van Gogh: Vincent Willem van Gogh (] ; 30 March 185329 July 1890) was a Dutch Post-Impressionist painter who is among the most famous and influential figures in the history of Western art. In just over a decade he created about 2,100 artworks, including around 860 oil paintings, most of them in the last two years of his life. They include landscapes, still lifes, portraits and self-portraits, and are characterised by bold colours and dramatic, impulsive and expressive brushwork that contributed to the foundations of modern art. His suicide at 37 followed years of mental illness and poverty.
Document 5: Asnières (Van Gogh series): Asnières, now named Asnières-sur-Seine, is the subject and location of paintings that Vincent van Gogh made in 1887. The works, which include parks, restaurants, riverside settings and factories, mark a breakthrough in van Gogh's artistic development. In the Netherlands his work was shaped by great Dutch masters as well as Anton Mauve a Dutch realist painter who was a leading member of the Hague School and a significant early influence on his cousin-in-law van Gogh. In Paris van Gogh was exposed to and influenced by Impressionism, Symbolism, Pointillism, and Japanese woodblock print genres.
Document 6: Still life paintings by Vincent van Gogh (Paris): Still life paintings by Vincent van Gogh (Paris) is the subject of many drawings, sketches and paintings by Vincent van Gogh in 1886 and 1887 after he moved to Montmartre in Paris from the Netherlands. While in Paris, Van Gogh transformed the subjects, color and techniques that he used in creating still life paintings.
Document 7: Portrait of Père Tanguy: Portrait of Père Tanguy, painted by Vincent van Gogh in 1887, is one of his three paintings of Julien Tanguy. The three works demonstrate a progression in van Gogh's artistic style after his arrival in Paris. The first is somber, and formed from a simple composition. The second introduces van Gogh's Japanese prints. The last and most advanced in style, skill and color integrates Japanese, Impressionist, and other influences on the Parisian artist community. This painting conveys a sense of serenity that van Gogh seeks for himself. This last painting of Tanguy is in the Musée Rodin, Paris.
Document 8: Van Gogh's family in his art: Van Gogh's family in his art is a group of works that Vincent van Gogh made for or about Van Gogh family members. In 1881 Vincent drew a portrait of his grandfather, also named Vincent van Gogh, and his sister Wil. While living in Nuenen, Vincent memorialized his father in "Still Life with Bible" following his death in 1885. There he also made many paintings and drawings in 1884 and 1885 of his parent's vicarage, its garden and the church. At the height of his career in Arles he made "Portrait of the Artist's Mother", "Memory of the Garden at Etten" of his mother and sister and "Novel Reader", which is thought to be of his sister, Wil.
Document 9: Peasant Woman Against a Background of Wheat: Peasant Woman Against a Background of Wheat is an 1890 painting by Vincent van Gogh. Van Gogh went on to paint several versions of this painting.
Document 10: Vincent van Gogh's display at Les XX, 1890: Vincent van Gogh's display at Les XX, 1890, in Brussels is an important testament to the recognition he received amongst avant-garde peers during his own lifetime. Participation in the annual exhibition of Les XX was for members and by invitation only. Van Gogh's choice proves that he was going for more than a simple selection of paintings he considered superior, but that he was willing to provide a well reasoned summary of his years of work in Provence. Evidently this notion remained neglected, and even more: it was washed away by the scandal his works provoked. Then the same works were again shown at the annual exhibition of the Artistes Indépendants in Paris which offered space for an expansion of the display: this was done by Theo van Gogh, the brother of Vincent, who was suffering from long lasting mental problems.
Document 11: Portrait of Dr. Gachet: Portrait of Dr. Gachet is one of the most revered paintings by the Dutch artist Vincent van Gogh. It depicts Dr. Paul Gachet who took care of Van Gogh during the final months of his life. There are two authenticated versions of the portrait, both painted in June 1890 at Auvers-sur-Oise. Both show Gachet sitting at a table and leaning his head on his right arm but they are easily differentiated in color and style. In 1990, the first version fetched a record price of $82.5 million ($75 million, plus a 10 percent buyer's commission) when sold at auction in New York.
Document 12: Van Gogh (1991 film): Van Gogh is a 1991 French film written and directed by Maurice Pialat. It stars Jacques Dutronc in the role of Dutch painter Vincent van Gogh, a role for which he won the 1992 César Award for Best Actor. Set in 1890, the film follows the last 67 days of Van Gogh's life and explores his relationships with his brother Theo, his physician Paul Gachet (most famous as the subject of Van Gogh's painting "Portrait of Dr. Gachet"), and the women in his life, including Gachet's daughter, Marguerite.
Document 13: Flowering Orchards: Flowering Orchards is a series of paintings which Dutch artist Vincent van Gogh executed in Arles, in southern France in the spring of 1888. Van Gogh arrived in Arles in February 1888 in a snowstorm; within two weeks the weather changed and the fruit trees were in blossom. Appreciating the symbolism of rebirth, Van Gogh worked with optimism and zeal on about fourteen paintings of flowering trees in the early spring. He also made paintings of flowering trees in Saint-Rémy the following year, in 1889.
Document 14: Copies by Vincent van Gogh: Copies by Vincent van Gogh form an important group of paintings executed by Vincent van Gogh between 1887 and early 1890. While at Saint-Paul asylum in Saint-Rémy-de-Provence, France, where Van Gogh admitted himself, he strived to have subjects during the cold winter months. Seeking to be reinvigorated artistically, Van Gogh did more than 30 copies of works by some of his favorite artists. About twenty-one of the works were copies after, or inspired by, Jean-François Millet. Rather than replicate, Van Gogh sought to translate the subjects and composition through his perspective, color, and technique. Spiritual meaning and emotional comfort were expressed through symbolism and color. His brother Theo van Gogh would call the pieces in the series some of his best work.
Document 15: Montmartre (Van Gogh series): The Montmartre paintings are a group of works that Vincent van Gogh made in 1886 and 1887 of the Paris district of Montmartre while living there with his brother Theo. Rather than capture urban settings in Paris, van Gogh preferred pastoral scenes, such as Montmartre and Asnières in the northwest suburbs. Of the two years in Paris, the work from 1886 often has the dark, somber tones of his early works from the Netherlands and Brussels. By the spring of 1887 van Gogh embraced use of color and light and created his own brushstroke techniques based upon Impressionism and Pointillism. The works in the series provide examples of his work during that period of time and the progression he made as an artist.
ground_truth: 860