input: Please answer the following: Information: - 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 . The painting has changed hands several times . In 1997 , Stephen Wynn paid $ 47.5 million for the painting . On October 7 , 2005 , it was announced that Stephen Wynn had sold the painting along with Gauguin 's Bathers to Steven A. Cohen for more than $ 100 million . - Oil painting is the process of painting with pigments with a medium of drying oil as the binder. Commonly used drying oils include linseed oil, poppy seed oil, walnut oil, and safflower oil. The choice of oil imparts a range of properties to the oil paint, such as the amount of yellowing or drying time. Certain differences, depending on the oil, are also visible in the sheen of the paints. An artist might use several different oils in the same painting depending on specific pigments and effects desired. The paints themselves also develop a particular consistency depending on the medium. The oil may be boiled with a resin, such as pine resin or frankincense, to create a varnish prized for its body and gloss. - Vincent Willem van Gogh (30 March 185329July 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. What entity does 'peasant woman against a background of wheat' has the relation 'material used' with?
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output: oil paint

input question: Information: - La Silla Observatory is an astronomical observatory in Chile with three telescopes built and operated by the European Southern Observatory (ESO). Several telescopes are located at the site and are partly maintained by ESO. The observatory is one of the largest in the Southern Hemisphere and was the first in Chile to be used by ESO. - The European Southern Observatory (ESO, formally: "European Organization for Astronomical Research in the Southern Hemisphere") is a 16-nation intergovernmental research organization for ground-based astronomy. Created in 1962, ESO has provided astronomers with state-of-the-art research facilities and access to the southern sky. The organisation employs about 730 staff members and receives annual member state contributions of approximately 131million. Its observatories are located in northern Chile. - Hans-Emil Schuster (born September 19, 1934 in Hamburg) is a German astronomer and a discoverer of minor planets and comets, who retired in October 1991. He worked at Hamburg Observatory at Bergedorf and European Southern Observatory (ESO), and was former acting director of La Silla Observatory. Since 1982, he was married to Rosemarie Schuster nee von Holt (March 28, 1935 September 18, 2006) - 3908 Nyx is an Amor and Mars - crosser asteroid . It was discovered by Hans - Emil Schuster on August 6 , 1980 , and is named after Nyx , the Greek goddess of the night , after which Pluto 's moon Nix is also named . It is 1 -- 2 km in diameter and is a V - type asteroid , meaning that it may be a fragment of the asteroid 4 Vesta . What entity does '3908 nyx' has the relation 'site of astronomical discovery' with????
output answer:
european southern observatory