A copycat suicide is defined as an emulation of another suicide that the person attempting suicide knows about either from local knowledge or due to accounts or depictions of the original suicide on television and in other media.

The massive wave of emulation suicides after a widely publicized suicide is known as the Werther effect, following Goethe's novel The Sorrows of Young Werther.

The well-known suicide serves as a model, in the absence of protective factors, for the next suicide. This is referred to as suicide contagion. They occasionally spread through a school system, through a community, or in terms of a celebrity suicide wave, nationally. This is called a suicide cluster. Suicide clusters are caused by the social learning of suicide related behaviors, or "copycat suicides". Point clusters are clusters of suicides in both time and space, and have been linked to direct social learning from nearby individuals. Mass clusters are clusters of suicides in time but not space, and have been linked to the broadcasting of information concerning celebrity suicides via the mass media Examples of celebrities whose suicides have inspired suicide clusters include Ruan Lingyu, the Japanese musicians Yukiko Okada and Hide, and Marilyn Monroe, whose death was followed by an increase of 200 more suicides than average for that August month.

Werther is an opera in four acts by Jules Massenet to a French libretto by Édouard Blau, Paul Milliet and Georges Hartmann based on the German epistolary novel The Sorrows of Young Werther by Johann Wolfgang von Goethe.

Massenet wrote the opera in 1887, but it did not premiere till February 16, 1892, and even then not in French but in a German version translated by Max Kalbeck. This happened at the Imperial Theatre Hofoper in Vienna. with great success. The French-language premiere followed in Geneva on December 27, 1892, and the first performance in France was at the Opéra-Comique, Paris on January 16, 1893.

The United States premiere with the Metropolitan Opera took place in Chicago on March 29, 1894, and then in the company's main house in New York City three weeks later. The UK premiere was at Covent Garden, London, on June 11, 1894.

Werther is regularly performed and has been recorded many times. Although written for a tenor, Massenet adjusted the role of Werther for a baritone, when Mattia Battistini sang it in Saint Petersburg in 1902. It is very occasionally performed in this version.

Data ( /ˈdeɪtə/ DAY-tə, /ˈdætə/ DA-tə, or /ˈdɑːtə/ DAH-tə) are values of qualitative or quantitative variables, belonging to a set of items. Data in computing (or data processing) are often represented by a combination of items organized in rows and multiple variables organized in columns. Data are typically the results of measurements and can be visualised using graphs or images. Data as an abstract concept can be viewed as the lowest level of abstraction from which information and then knowledge are derived. Raw data, i.e., unprocessed data, refers to a collection of numbers, characters and is a relative term; data processing commonly occurs by stages, and the "processed data" from one stage may be considered the "raw data" of the next. Field data refers to raw data collected in an uncontrolled in situ environment. Experimental data refers to data generated within the context of a scientific investigation by observation and recording.

The word data is the plural of datum, neuter past participle of the Latin dare, "to give", hence "something given". In discussions of problems in geometry, mathematics, engineering, and so on, the terms givens and data are used interchangeably. Such usage is the origin of data as a concept in computer science or data processing: data are numbers, words, images, etc., accepted as they stand.