Problem: Age of Enlightenment:

Francis Hutcheson, a moral philosopher, described the utilitarian and consequentialist principle that virtue is that which provides, in his words, "the greatest happiness for the greatest numbers". Much of what is incorporated in the scientific method (the nature of knowledge, evidence, experience, and causation) and some modern attitudes towards the relationship between science and religion were developed by his protégés David Hume and Adam Smith. Hume became a major figure in the skeptical philosophical and empiricist traditions of philosophy.

The nature of knowledge, evidence, experience, and causation together are called what?
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A: the scientific method


Problem: Department store:

The site where the Saint Petersburg Passage sprawls had been devoted to trade since the city's foundation in the early 18th century. It had been occupied by various shops and warehouses (Maly Gostiny Dvor, Schukin Dvor, Apraksin Dvor) until 1846, when Count Essen-Stenbock-Fermor acquired the grounds to build an elite shopping mall for the Russian nobility and wealthy bourgeoisie. Stenbock-Fermor conceived of the Passage as more than a mere shopping mall, but also as a cultural and social centre for the people of St Petersburg. The edifice contained coffee-houses, confectioneries, panorama installations, an anatomical museum, a wax museum, and even a small zoo, described by Dostoyevsky in his extravaganza "Crocodile, or Passage through the Passage". The concert hall became renowned as a setting for literary readings attended by the likes of Dostoevsky and Turgenev. Parenthetically, the Passage premises have long been associated with the entertainment industry and still remains home to the Komissarzhevskaya Theatre.

Who founded a shopping mall reserved for the most elites of society? 
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A: Count Essen-Stenbock-Fermor


Problem: Frédéric Chopin:

In his native Poland, in France, where he composed most of his works, and beyond, Chopin's music, his status as one of music's earliest superstars, his association (if only indirect) with political insurrection, his love life and his early death have made him, in the public consciousness, a leading symbol of the Romantic era. His works remain popular, and he has been the subject of numerous films and biographies of varying degrees of historical accuracy.

Chopin is closely associated with what era?
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A: Romantic era


Problem: Botany:

The algae are a polyphyletic group and are placed in various divisions, some more closely related to plants than others. There are many differences between them in features such as cell wall composition, biochemistry, pigmentation, chloroplast structure and nutrient reserves. The algal division Charophyta, sister to the green algal division Chlorophyta, is considered to contain the ancestor of true plants. The Charophyte class Charophyceae and the land plant sub-kingdom Embryophyta together form the monophyletic group or clade Streptophytina.

Are all species of algae similar?
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A:
many differences