Context and question: All modern birds lie within the crown group Aves (alternately Neornithes), which has two subdivisions: the Palaeognathae, which includes the flightless ratites (such as the ostriches) and the weak-flying tinamous, and the extremely diverse Neognathae, containing all other birds. These two subdivisions are often given the rank of superorder, although Livezey and Zusi assigned them "cohort" rank. Depending on the taxonomic viewpoint, the number of known living bird species varies anywhere from 9,800 to 10,050.
What is the number range of living bird species?
Answer: 9,800 to 10,050
Context and question: There is often a fierce rivalry between the two strongest teams in a national league, and this is particularly the case in La Liga, where the game between Barcelona and Real Madrid is known as El Clasico. From the start of national competitions the clubs were seen as representatives of two rival regions in Spain: Catalonia and Castile, as well as of the two cities. The rivalry reflects what many regard as the political and cultural tensions felt between Catalans and the Castilians, seen by one author as a re-enactment of the Spanish Civil War.
What kind of tensions are the two teams viewed as displaying?
Answer: political and cultural
Context and question: The collation of all known variants of a text is referred to as a variorum, namely a work of textual criticism whereby all variations and emendations are set side by side so that a reader can track how textual decisions have been made in the preparation of a text for publication. The Bible and the works of William Shakespeare have often been the subjects of variorum editions, although the same techniques have been applied with less frequency to many other works, such as Walt Whitman's Leaves of Grass, and the prose writings of Edward Fitzgerald.
What is a variorum?
Answer:
The collation of all known variants of a text