[Q]: Information: - A serial killer is a person who typically murders three or more people, usually in service of abnormal psychological gratification, with the murders taking place over more than a month and including a significant break (a "cooling off period") between them. Different authorities apply different criteria when designating serial killers; while most set a threshold of three murders, others extend it to four or lessen it to two. The Federal Bureau of Investigation (FBI), for example, defines serial killing as "a series of two or more murders, committed as separate events, usually, but not always, by one offender acting alone". - Svetozar Ristovski (born January 26, 1972) is a Macedonian film director who now resides in Canada. His first film was the 2000 short "Hunter" about the psychological study of a wartime sniper. He marked his English language debut with 2010 "Dear Mr. Gacy" based on American serial killer John Wayne Gacy. In addition to the awards he won for "Mirage", he also won the Golden Lily Award at GoEast for "Joy of Life" in 2002. - A film director is a person who directs the making of a film. Generally, a film director controls a film's artistic and dramatic aspects, and visualizes the script while guiding the technical crew and actors in the fulfillment of that vision. The director has a key role in choosing the cast members, production design, and the creative aspects of filmmaking. Under European Union law, the director is viewed as the author of the film. - Dear Mr. Gacy is a 2010 Canadian drama thriller film directed by Svetozar Ristovski , starring William Forsythe and Jesse Moss . The film is based on Jason Moss 's memoir , The Last Victim . - The Last Victim: A True-Life Journey into the Mind of the Serial Killer (1999) is a non-fiction work by author Jason Moss in which he details his fascination and subsequent correspondence with several notorious American serial killers. - John Wayne Gacy, Jr. (March 17, 1942 May 10, 1994) was an American serial killer and rapist. He sexually assaulted and murdered at least 33 teenage boys and young men between 1972 and 1978 in Cook County, Illinois (a part of metropolitan Chicago). What is the relationship between 'dear mr. gacy' and 'serial killer'?
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Problem: Information: - Hermann Heinrich Gossen ( 7 September 1810 -- 13 February 1858 ) was a Prussian economist who is often regarded as the first to elaborate a general theory of marginal utility . - Prussia was a historic state originating out of the Duchy of Prussia and the Margraviate of Brandenburg, and centred on the region of Prussia. For centuries, the House of ruled Prussia, successfully expanding its size by way of an unusually well-organised and effective army. Prussia, with its capital in and from 1701 in Berlin, shaped the history of Germany. In 1871, German states united to create the German Empire under Prussian leadership. In November 1918, the monarchies were abolished and the nobility lost its political power during the German Revolution of 191819. The Kingdom of Prussia was thus abolished in favour of a republicthe Free State of Prussia, a state of Germany from 1918 until 1933. From 1933, Prussia lost its independence as a result of the Prussian coup, when the Nazi regime was successfully establishing its ' laws in pursuit of a unitary state. With the end of the Nazi regime, the division of Germany into allied-occupation zones and the separation of its territories east of the line, which were incorporated into Poland and the Soviet Union, the State of Prussia ceased to exist de facto in 1945. Prussia existed "" until its formal liquidation by the Allied Control Council Enactment No. 46 of 25 February 1947. - Economics (, ) is a social science concerned with the factors that determine the production, distribution, and consumption of goods and services. The term "economics" comes from the Ancient Greek from (', pronounced "eekos", "house") and (', "custom" or "law"), hence "rules of the house (hold for good management)". 'Political economy' was the earlier name for the subject, but economists in the late 19th century suggested "economics" as a shorter term for "economic science" to establish itself as a separate discipline outside of political science and other social sciences. - In economics, utility is the satisfaction or benefit derived by consuming a product, thus the marginal utility of a good or service is the change in the utility from increase or decrease in the consumption of that good or service. Economists sometimes speak of a law of diminishing marginal utility, meaning that the first unit of consumption of a good or service yields more utility than the second and subsequent units, with a continuing reduction for greater amounts. Therefore, the fall in marginal utility as consumption increases is known as diminishing marginal utility. Mathematically, MU>MU>MU...>MU. The marginal decision rule states that a good or service should be consumed at a quantity at which the marginal utility is equal to the marginal cost. What is the relationship between 'hermann heinrich gossen' and 'german'?

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